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playShouldStart = null; } }; function loadMoreVideos(playerId, vp, start, finish, callback){ var playlistInfo = playlists[playerId-1]; if(playlistInfo.loading >= finish) return; playlistInfo.loading = finish; $.ajax({ url: '/api/upge/cheetah-photo-search/query_videos2', dataType: 'json', data: { query: playlistInfo.query, orderby: playlistInfo.orderby, start: start, count: finish-start }, success: function(response){ var pl = vp.getPlaylist().slice(0); pl.push.apply(pl, response); vp.setPlaylist(pl); callback(); } }); } if(parts.length == 1 && matchDash(parts[0])){ var pl = vp.getActualPlaylist(); var vids = parseDash(parts[0]); parts = []; for(var i = 0; i < vids.length; i++){ playQueue.push({ 'video': pl[vids[i]-1], 'start': 0, 'stop': null }) } if(vids.length){ if(vids[vids.length-1]-1>=pl.length){ loadMoreVideos(playerId, vp, pl.length, vids[vids.length-1], function(){ if(fsonload){ activateTabArea(tab, parts[0]+'/fs'); }else{ activateTabArea(tab, parts[0]); } var pls = vp.getPlaylist(); vp.playFromPlaylist(pls[pls.length-1]); vp.playVideo(); scrollToPlaylistPosition(vp); }); return true; } } if(playQueue){ playQueueUpdate(); vp.playVideo(); parsed = true; playShouldStart = 0; } } if(previewMode){ var vids = []; var dur = 0; var pl = vp.getActualPlaylist(); area = parts[0]; if(parts.length == 1 && matchPosition(parts[0])){ vids = parseDash('1-'+pl.length); dur = parsePosition(parts[0]); parts = []; }else if(parts.length == 1 && matchDash(parts[0])){ vids = parseDash(parts[0]); dur = parsePosition("999:59"); parts = []; } if(parts.length == 2 && matchDash(parts[0]) && matchPosition(parts[1])){ vids = parseDash(parts[0]); dur = parsePosition(parts[1]); parts = []; } for(var i = 0; i < vids.length; i++){ playQueue.push({ 'video': pl[vids[i]-1], 'start': 0, 'stop': dur }) } if(playQueue){ playQueueUpdate(); vp.playVideo(); parsed = true; } } if(parts.length>1){ for(var i = 0; i < parts.length; i++){ var sel = findMatchingVideo(vp, parts[i]); if(sel){ playQueue.push({ 'video': sel, 'start': 0, 'stop': null }) } } if(playQueue){ playQueueUpdate(); 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if(window.history && history.replaceState && document.location.hostname.match(/^(youtube\.)?(\w{2,3}\.)?wn\.com$/)){ if(path == main_tab || path == main_tab+'/' || path == '' || path == '/') { path = basepath; } else if( path.match('^'+main_tab+'/') ){ path = basepath + '/' + path.replace(main_tab+'/', '').replace('--','/'); } else { path = basepath + '/' + path.replace('--','/'); } if(document.location.search){ path += document.location.search; } if(window.lastHistory) { history.pushState(null, null, path); } else if(window.lastHistory != path){ history.replaceState(null, null, path); window.lastHistory = path; } } else{ path = path.replace('--','/'); if(path == main_tab || path == main_tab+'/' || path == '' || path == '/') { path = ''; } if(window.lastHistory != '/'+path){ window.location.hash = path? 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  Gravitational Field

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Gravitational constant

The gravitational constant, approximately 6989667400000000000♠6.674×10⁻¹¹ N⋅m²/kg² and denoted by the letter G, is an empirical physical constant involved in the calculation(s) of gravitational force between two bodies. It usually appears in Sir Isaac Newton's law of universal gravitation, and in Albert Einstein's general theory of relativity. It is also known as the universal gravitational constant, Newton's constant, and colloquially as Big G. It should not be confused with "small g" (g), which is the local gravitational field of Earth (equivalent to the free-fall acceleration).

Laws and constants

According to the law of universal gravitation, the attractive force (F) between two bodies is directly proportional to the product of their masses (m₁ and m₂), and inversely proportional to the square of the distance, r, (inverse-square law) between them:

The constant of proportionality, G, is the gravitational constant.

The gravitational constant is a physical constant that is difficult to measure with high accuracy. In SI units, the 2014 CODATA-recommended value of the gravitational constant (with standard uncertainty in parentheses) is:

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This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Gravitational_constant

Gravitational field

In physics, a gravitational field is a model used to explain the influence that a massive body extends into the space around itself, producing a force on another massive body. Thus, a gravitational field is used to explain gravitational phenomena, and is measured in newtons per kilogram (N/kg). In its original concept, gravity was a force between point masses. Following Newton, Laplace attempted to model gravity as some kind of radiation field or fluid, and since the 19th century explanations for gravity have usually been taught in terms of a field model, rather than a point attraction.

In a field model, rather than two particles attracting each other, the particles distort spacetime via their mass, and this distortion is what is perceived and measured as a "force". In such a model one states that matter moves in certain ways in response to the curvature of spacetime, and that there is either no gravitational force, or that gravity is a fictitious force.

Classical mechanics

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This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Gravitational_field

Field strength

In physics, field strength or intensity means the magnitude of a vector-valued field. For example, electromagnetic field results in both electric field strength and magnetic field strength. As an application, in radio frequency telecommunications, the signal strength excites a receiving antenna and thereby induce a voltage at a specific frequency and polarization in order to provide an input signal to a radio receiver. Field strength meters are used for such applications as cellular, broadcasting, wi-fi and a wide variety of other radio-related applications.

See also

Dipole field strength in free space

Field strength tensor

References

Read more

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Field_strength

Field strength (theoretical physics)

In theoretical physics, field strength is another name for the curvature form. For the electromagnetic field, the curvature form is an antisymmetric matrix whose elements are the electric field and magnetic field: the electromagnetic tensor.

See also

Field strength tensor

References

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This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Field_strength_(theoretical_physics)

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1:23

What is a gravitational field?

• Order: Reorder
• Duration: 1:23
• Uploaded Date: 09 Jun 2016
• views: 51686

Catalogue at https://xmphysics.wordpress.com Follow me on facebook: https://www.facebook.com/xmphysics Soundtrack from audionautix.com

Catalogue at https://xmphysics.wordpress.com Follow me on facebook: https://www.facebook.com/xmphysics Soundtrack from audionautix.com

https://wn.com/What_Is_A_Gravitational_Field

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10:40

Gravitational Field Strength

• Order: Reorder
• Duration: 10:40
• Uploaded Date: 21 Jun 2020
• views: 88376

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Gravitational Fields | A-Level Physics | Doodle Science

• Order: Reorder
• Duration: 5:00
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• views: 151984

A Level Physics Doodle Science teaches you high school and College physics in a less boring way in almost no time! Follow me: https://twitter.com/DoodleSci Y...

A Level Physics Doodle Science teaches you high school and College physics in a less boring way in almost no time! Follow me: https://twitter.com/DoodleSci You can support me at: https://patreon.com/doodlescience Script: A gravitational field is a region around one mass, which affects other nearby masses. It is very weak however which is why the effect is only significant on large objects like the Earth. We can represent the Earth’s gravitational field by drawing field lines showing the direction of the gravitational force on masses in the field. In this case the field is radial and equally spread around the earth. On the surface of the earth the gravitational field is approximately uniform because the field lines are virtually pointing in the same direction and are equally spaced. This is why we assume the acceleration due to gravity is a constant of 9.81m/s^2 because the change at small vertical heights is negligible. Newton’s law of gravitation states that all masses attract each other with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between the two centres of mass. This gives us the equation F= - GMm/r^2. Where G is the universal gravitational constant of 6.67x10^-11; M is the mass of the larger body; m is the mass of the smaller body; and r is the distance between the centres of mass of the two bodies. The minus sign simply refers to the to the fact that the force is attractive. For example, two bodies, one of mass 6kg and the other of mass 20kg are placed 50cm apart. From this we can work out the gravitational force acting on each object as 3.20x10^-8N. The force acting on each body is equal because they are attracted to each other. The gravitational field strength is the force per unit mass at a point in a gravitational field. For a uniform field the equation is F/m, where F is the force experienced by the body and m is the mass of the body. For a radial field, the gravitational field strength obeys an inverse square law. The equation for it is g=GM/r^2. You can see how the gravitational field strength would decrease the further you were from the centre of the body producing the field. This formula can be used to work out the masses of celestial bodies. For example, given that the gravitational field strength on the earth’s surface is 9.81 N/kg and the radius of the earth is 6400km, we can work out the mass of the earth to be 6.02x10^24kg. When considering planetary motion, the gravitational force acting on the body orbiting is equal to the centripetal force because the force acts perpendicular to the direction of motion. By equating the two formulas and using the formula for the speed of an object in circular motion we get the equation T^2=(4π^2/GM)r^3. Where T is the orbital period in seconds and r is the distance between the centres of mass of the orbiting body and body being orbited. This equation shows Kepler’s third law which states that the T^2 is directly proportional to r^3. This also suggests that for a set of celestial bodies (e.g. the planets of our solar system) orbiting the same large body (e.g. the sun), T^2/r^3 is a constant and is equal for all the celestial bodies. For example, given that it takes 365 days for the Earth to orbit the sun and that the distance of the earth from the centre of the sun is 1.5x10^11m. We can work out the mass of the sun to be about 2.00x10^30kg. Given that the orbital period of mars is 687 days, we can use the Earth’s orbital characteristics to work how far Mars is from the centre of the Sun as being 2.29x10^11m. A geostationary orbit is an orbit around the Earth whose orbital period is 24 hours. They are located above the equator and are always vertically above the same point on the surface of the Earth. This makes them useful for TV satellites because the dishes can be pointed to a fixed point in the sky. Which is quite convenient I’d say. References: 1. CGP AS & A2 Physics for OCR A, ISBN: 9781847624192

https://wn.com/Gravitational_Fields_|_A_Level_Physics_|_Doodle_Science

A Level Physics Doodle Science teaches you high school and College physics in a less boring way in almost no time! Follow me: https://twitter.com/DoodleSci You can support me at: https://patreon.com/doodlescience Script: A gravitational field is a region around one mass, which affects other nearby masses. It is very weak however which is why the effect is only significant on large objects like the Earth. We can represent the Earth’s gravitational field by drawing field lines showing the direction of the gravitational force on masses in the field. In this case the field is radial and equally spread around the earth. On the surface of the earth the gravitational field is approximately uniform because the field lines are virtually pointing in the same direction and are equally spaced. This is why we assume the acceleration due to gravity is a constant of 9.81m/s^2 because the change at small vertical heights is negligible. Newton’s law of gravitation states that all masses attract each other with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between the two centres of mass. This gives us the equation F= - GMm/r^2. Where G is the universal gravitational constant of 6.67x10^-11; M is the mass of the larger body; m is the mass of the smaller body; and r is the distance between the centres of mass of the two bodies. The minus sign simply refers to the to the fact that the force is attractive. For example, two bodies, one of mass 6kg and the other of mass 20kg are placed 50cm apart. From this we can work out the gravitational force acting on each object as 3.20x10^-8N. The force acting on each body is equal because they are attracted to each other. The gravitational field strength is the force per unit mass at a point in a gravitational field. For a uniform field the equation is F/m, where F is the force experienced by the body and m is the mass of the body. For a radial field, the gravitational field strength obeys an inverse square law. The equation for it is g=GM/r^2. You can see how the gravitational field strength would decrease the further you were from the centre of the body producing the field. This formula can be used to work out the masses of celestial bodies. For example, given that the gravitational field strength on the earth’s surface is 9.81 N/kg and the radius of the earth is 6400km, we can work out the mass of the earth to be 6.02x10^24kg. When considering planetary motion, the gravitational force acting on the body orbiting is equal to the centripetal force because the force acts perpendicular to the direction of motion. By equating the two formulas and using the formula for the speed of an object in circular motion we get the equation T^2=(4π^2/GM)r^3. Where T is the orbital period in seconds and r is the distance between the centres of mass of the orbiting body and body being orbited. This equation shows Kepler’s third law which states that the T^2 is directly proportional to r^3. This also suggests that for a set of celestial bodies (e.g. the planets of our solar system) orbiting the same large body (e.g. the sun), T^2/r^3 is a constant and is equal for all the celestial bodies. For example, given that it takes 365 days for the Earth to orbit the sun and that the distance of the earth from the centre of the sun is 1.5x10^11m. We can work out the mass of the sun to be about 2.00x10^30kg. Given that the orbital period of mars is 687 days, we can use the Earth’s orbital characteristics to work how far Mars is from the centre of the Sun as being 2.29x10^11m. A geostationary orbit is an orbit around the Earth whose orbital period is 24 hours. They are located above the equator and are always vertically above the same point on the surface of the Earth. This makes them useful for TV satellites because the dishes can be pointed to a fixed point in the sky. Which is quite convenient I’d say. References: 1. CGP AS & A2 Physics for OCR A, ISBN: 9781847624192

• published: 01 Feb 2016
• views: 151984

5:38

Gravitational Field Strength

• Order: Reorder
• Duration: 5:38
• Uploaded Date: 22 Jun 2014
• views: 166271

025 - Gravitational Field Strength In this video Paul Andersen explains how the gravitational field strength is directly related to the mass of the object and ...

025 - Gravitational Field Strength In this video Paul Andersen explains how the gravitational field strength is directly related to the mass of the object and indirectly related to the square of the distance from the center of mass. The equation for gravitational field strength was discovered by Sir Isaac Newton and contains a gravitational constant. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Music Attribution Title: String Theory Artist: Herman Jolly http://sunsetvalley.bandcamp.com/track/string-theory All of the images are licensed under creative commons and public domain licensing: "File:GRACE Globe Animation.gif." Wikipedia, the Free Encyclopedia. Accessed May 22, 2014. http://en.wikipedia.org/wiki/File:GRACE_globe_animation.gif. "Gravity and Orbits." PhET. Accessed May 22, 2014. http://phet.colorado.edu/en/simulation/gravity-and-orbits. Sjlegg. English: Gravitational Field Lines and Equipotentials (red) around the Earth., May 9, 2009. Own work. http://commons.wikimedia.org/wiki/File:Gravitational_field_Earth_lines_equipotentials.svg.

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025 - Gravitational Field Strength In this video Paul Andersen explains how the gravitational field strength is directly related to the mass of the object and indirectly related to the square of the distance from the center of mass. The equation for gravitational field strength was discovered by Sir Isaac Newton and contains a gravitational constant. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Music Attribution Title: String Theory Artist: Herman Jolly http://sunsetvalley.bandcamp.com/track/string-theory All of the images are licensed under creative commons and public domain licensing: "File:GRACE Globe Animation.gif." Wikipedia, the Free Encyclopedia. Accessed May 22, 2014. http://en.wikipedia.org/wiki/File:GRACE_globe_animation.gif. "Gravity and Orbits." PhET. Accessed May 22, 2014. http://phet.colorado.edu/en/simulation/gravity-and-orbits. Sjlegg. English: Gravitational Field Lines and Equipotentials (red) around the Earth., May 9, 2009. Own work. http://commons.wikimedia.org/wiki/File:Gravitational_field_Earth_lines_equipotentials.svg.

• published: 22 Jun 2014
• views: 166271

17:34

How Gravity Actually Works

• Order: Reorder
• Duration: 17:34
• Uploaded Date: 09 Oct 2020
• views: 12555664

The General Theory of Relativity tells us gravity is not a force, gravitational fields don't exist. Objects tend to move on straight paths through curved spacet...

The General Theory of Relativity tells us gravity is not a force, gravitational fields don't exist. Objects tend to move on straight paths through curved spacetime. Thanks to Caséta by Lutron for sponsoring this video. Find out more at: https://www.lutron.com/veritasium Huge thanks to Prof. Geraint Lewis for hours of consulting on this video so I could get these ideas straight in my own brain. Check out his YouTube channel: https://ve42.co/gfl or his books: https://ve42.co/GFLbooks Amazing VFX, compositing, and editing by Jonny Hyman 2D animations by Ivy Tello Filmed by Steven Warren and Raquel Nuno Special thanks to Petr Lebedev for reviews and script consultation Music by Jonny Hyman and from Epidemic Sound https://epidemicsound.com Rocket made by Goodnight and Co. Screen images in rocket by Geoff Barrett Slow motion rocket exhaust footage from Joe Barnard at BPS.Space https://www.youtube.com/channel/UCILl8ozWuxnFYXIe2svjHhg

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The General Theory of Relativity tells us gravity is not a force, gravitational fields don't exist. Objects tend to move on straight paths through curved spacetime. Thanks to Caséta by Lutron for sponsoring this video. Find out more at: https://www.lutron.com/veritasium Huge thanks to Prof. Geraint Lewis for hours of consulting on this video so I could get these ideas straight in my own brain. Check out his YouTube channel: https://ve42.co/gfl or his books: https://ve42.co/GFLbooks Amazing VFX, compositing, and editing by Jonny Hyman 2D animations by Ivy Tello Filmed by Steven Warren and Raquel Nuno Special thanks to Petr Lebedev for reviews and script consultation Music by Jonny Hyman and from Epidemic Sound https://epidemicsound.com Rocket made by Goodnight and Co. Screen images in rocket by Geoff Barrett Slow motion rocket exhaust footage from Joe Barnard at BPS.Space https://www.youtube.com/channel/UCILl8ozWuxnFYXIe2svjHhg

• published: 09 Oct 2020
• views: 12555664

11:16

Discovery That Changed Physics! Gravity is NOT a Force!

• Order: Reorder
• Duration: 11:16
• Uploaded Date: 14 Sep 2022
• views: 2156796

Discovery That Changed Physics! Gravity is NOT a Force! ► Subscribe: https://goo.gl/r5jd1F Gravity is one of the four fundamental forces of nature in the Unive...

Discovery That Changed Physics! Gravity is NOT a Force! ► Subscribe: https://goo.gl/r5jd1F Gravity is one of the four fundamental forces of nature in the Universe. But of the four forces of nature, it stands alone as different. In fact, gravity isn’t the force you think it is, and perhaps it's not a force at all. If you think you understand gravity, then get ready to change the way you think about gravity…forever. We are on social media: www.facebook.com/destinymediaa www.instagram.com/destiny.media.yt/ The Destiny voice: www.TomsVoiceovers.co.uk Sourses: https://pastebin.com/raw/pcZGVx2S

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Discovery That Changed Physics! Gravity is NOT a Force! ► Subscribe: https://goo.gl/r5jd1F Gravity is one of the four fundamental forces of nature in the Universe. But of the four forces of nature, it stands alone as different. In fact, gravity isn’t the force you think it is, and perhaps it's not a force at all. If you think you understand gravity, then get ready to change the way you think about gravity…forever. We are on social media: www.facebook.com/destinymediaa www.instagram.com/destiny.media.yt/ The Destiny voice: www.TomsVoiceovers.co.uk Sourses: https://pastebin.com/raw/pcZGVx2S

• published: 14 Sep 2022
• views: 2156796

8:11

Gravitational Field Introduction

• Order: Reorder
• Duration: 8:11
• Uploaded Date: 28 Jan 2018
• views: 48899

The gravitational field is introduced and illustrated. For a constant field and a non-constant field around a spherical object. Want Lecture Notes? http://www.f...

The gravitational field is introduced and illustrated. For a constant field and a non-constant field around a spherical object. Want Lecture Notes? http://www.flippingphysics.com/gravitational-field.html This is an AP Physics 1 topic. 0:00 The two force of gravity equations 0:55 The constant gravitational field equation 2:25 Gravitational Field Lines 3:16 What is a gravitational field? 4:33 The gravitational field equation around a spherical object 5:48 Drawing the field lines around a spherical object 7:02 Are gravitational field lines real? Next Video: Universal Gravitational Potential Energy Introduction http://www.flippingphysics.com/universal-gravitational-potential-energy.html Multilingual? Please help translate Flipping Physics videos! http://www.flippingphysics.com/translate.html Previous Video: Number of g's or g-Forces Introduction http://www.flippingphysics.com/g-forces.html Please support me on Patreon! http://patreon.com/FlippingPhysics Thank you to Tony Dunn, Christopher Becke and Jonathan Everett for being my Quality Control Team for this video. http://flippingphysics.com/quality-control.html Thank you to Youssef Nasr for transcribing the English subtitles of this video.

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The gravitational field is introduced and illustrated. For a constant field and a non-constant field around a spherical object. Want Lecture Notes? http://www.flippingphysics.com/gravitational-field.html This is an AP Physics 1 topic. 0:00 The two force of gravity equations 0:55 The constant gravitational field equation 2:25 Gravitational Field Lines 3:16 What is a gravitational field? 4:33 The gravitational field equation around a spherical object 5:48 Drawing the field lines around a spherical object 7:02 Are gravitational field lines real? Next Video: Universal Gravitational Potential Energy Introduction http://www.flippingphysics.com/universal-gravitational-potential-energy.html Multilingual? Please help translate Flipping Physics videos! http://www.flippingphysics.com/translate.html Previous Video: Number of g's or g-Forces Introduction http://www.flippingphysics.com/g-forces.html Please support me on Patreon! http://patreon.com/FlippingPhysics Thank you to Tony Dunn, Christopher Becke and Jonathan Everett for being my Quality Control Team for this video. http://flippingphysics.com/quality-control.html Thank you to Youssef Nasr for transcribing the English subtitles of this video.

• published: 28 Jan 2018
• views: 48899

5:11

GCSE Physics - Gravity, Weight and GPE #3

• Order: Reorder
• Duration: 5:11
• Uploaded Date: 16 Jun 2019
• views: 350885

This videos covers: - What gravity is - What the strength of gravity depends on - How to calculate weight - How to calculate gravitational potential energy G...

This videos covers: - What gravity is - What the strength of gravity depends on - How to calculate weight - How to calculate gravitational potential energy General info: - You need to memorise the equation for gravitational potential energy - Suitable for all GCSE and IGCSE courses Exam board specific info: AQA - Everything is relevant to your course! IGCSE Edexcel - Everything is relevant to your course! Edexcel - Everything is relevant to your course! OCR 21st Century - Everything is relevant to your course! OCR Gateway - Everything is relevant to your course!

https://wn.com/Gcse_Physics_Gravity,_Weight_And_Gpe_3

This videos covers: - What gravity is - What the strength of gravity depends on - How to calculate weight - How to calculate gravitational potential energy General info: - You need to memorise the equation for gravitational potential energy - Suitable for all GCSE and IGCSE courses Exam board specific info: AQA - Everything is relevant to your course! IGCSE Edexcel - Everything is relevant to your course! Edexcel - Everything is relevant to your course! OCR 21st Century - Everything is relevant to your course! OCR Gateway - Everything is relevant to your course!

• published: 16 Jun 2019
• views: 350885

1:01

Gravitational field inside earth| #jee #neet #boardexam

• Order: Reorder
• Duration: 1:01
• Uploaded Date: 04 Aug 2024
• views: 8

https://wn.com/Gravitational_Field_Inside_Earth|_Jee_Neet_Boardexam

• published: 04 Aug 2024
• views: 8

22:35

A Level Physics Revision: All of Gravitational Fields (in under 23 minutes)

• Order: Reorder
• Duration: 22:35
• Uploaded Date: 29 Nov 2020
• views: 81427

Join my free Physics Newsletter: https://zphysicslessons.net/about My Gravitation Workbook: https://koji.to/k/9Jut My Physics Workbooks: https://zphysicslesso...

Join my free Physics Newsletter: https://zphysicslessons.net/about My Gravitation Workbook: https://koji.to/k/9Jut My Physics Workbooks: https://zphysicslessons.net/my-workbooks Gravitation Past Paper Questions Solutions: https://youtu.be/pUsTwN5NgzI Chapters: 00:00 Intro 00:33 Gravitational Fields and Lines 03:10 Newton's Law of Gravitational Attraction 04:27 Gravitational Field Strength 05:48 Kepler's Laws 08:33 Proof of Kepler's Third Law 10:55 Geostationary Orbits 12:07 Height of a geostationary orbit 16:18 The gravitational potential and potential energy

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Join my free Physics Newsletter: https://zphysicslessons.net/about My Gravitation Workbook: https://koji.to/k/9Jut My Physics Workbooks: https://zphysicslessons.net/my-workbooks Gravitation Past Paper Questions Solutions: https://youtu.be/pUsTwN5NgzI Chapters: 00:00 Intro 00:33 Gravitational Fields and Lines 03:10 Newton's Law of Gravitational Attraction 04:27 Gravitational Field Strength 05:48 Kepler's Laws 08:33 Proof of Kepler's Third Law 10:55 Geostationary Orbits 12:07 Height of a geostationary orbit 16:18 The gravitational potential and potential energy

• published: 29 Nov 2020
• views: 81427

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1:23

What is a gravitational field?

Catalogue at https://xmphysics.wordpress.com Follow me on facebook: https://www.facebook.c...

published: 09 Jun 2016

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What is a gravitational field?

What is a gravitational field?

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• published: 09 Jun 2016
• views: 51686

Catalogue at https://xmphysics.wordpress.com Follow me on facebook: https://www.facebook.com/xmphysics Soundtrack from audionautix.com

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10:40

Gravitational Field Strength

This physics video tutorial explains how to calculate the gravitational field strength of ...

published: 21 Jun 2020

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Gravitational Field Strength

Gravitational Field Strength

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• published: 21 Jun 2020
• views: 88376

This physics video tutorial explains how to calculate the gravitational field strength of the Earth at the surface and at some distance above the Earth's surface. Static Friction & Centripetal Force: https://www.youtube.com/watch?v=dMgyy95uJUg Normal Force on a Hill: https://www.youtube.com/watch?v=Ec6btKP4qfg Banked Turn Physics Problems: https://www.youtube.com/watch?v=FWXT-IzgbP0 Non-Uniform Circular Motion: https://www.youtube.com/watch?v=XlvD5_0FVSc Gravitational Force: https://www.youtube.com/watch?v=Ep1jIhHdf2A ______________________________ Universal Law of Gravitation: https://www.youtube.com/watch?v=8CykJ3NgBQs Gravitational Acceleration: https://www.youtube.com/watch?v=kubaJtXz0c8 Satellite Speed: https://www.youtube.com/watch?v=QIaAleG0Eb4 Kepler's Third Law of Motion: https://www.youtube.com/watch?v=CCsbSq9wlyI Circular Motion Review: https://www.youtube.com/watch?v=_psIWtPBHzA ____________________________________ Kinetic Energy and Potential Energy: https://www.youtube.com/watch?v=DyaVgHGssos Work, Energy, and Power: https://www.youtube.com/watch?v=_MR1Dp8-F8w Final Exams and Video Playlists: https://www.video-tutor.net/ Full-Length Videos and Worksheets: https://www.patreon.com/MathScienceTutor/collections Physics PDF Worksheets: https://www.video-tutor.net/physics-basic-introduction.html

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5:00

Gravitational Fields | A-Level Physics | Doodle Science

A Level Physics Doodle Science teaches you high school and College physics in a less bori...

published: 01 Feb 2016

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Gravitational Fields | A-Level Physics | Doodle Science

Gravitational Fields | A-Level Physics | Doodle Science

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• published: 01 Feb 2016
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A Level Physics Doodle Science teaches you high school and College physics in a less boring way in almost no time! Follow me: https://twitter.com/DoodleSci You can support me at: https://patreon.com/doodlescience Script: A gravitational field is a region around one mass, which affects other nearby masses. It is very weak however which is why the effect is only significant on large objects like the Earth. We can represent the Earth’s gravitational field by drawing field lines showing the direction of the gravitational force on masses in the field. In this case the field is radial and equally spread around the earth. On the surface of the earth the gravitational field is approximately uniform because the field lines are virtually pointing in the same direction and are equally spaced. This is why we assume the acceleration due to gravity is a constant of 9.81m/s^2 because the change at small vertical heights is negligible. Newton’s law of gravitation states that all masses attract each other with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between the two centres of mass. This gives us the equation F= - GMm/r^2. Where G is the universal gravitational constant of 6.67x10^-11; M is the mass of the larger body; m is the mass of the smaller body; and r is the distance between the centres of mass of the two bodies. The minus sign simply refers to the to the fact that the force is attractive. For example, two bodies, one of mass 6kg and the other of mass 20kg are placed 50cm apart. From this we can work out the gravitational force acting on each object as 3.20x10^-8N. The force acting on each body is equal because they are attracted to each other. The gravitational field strength is the force per unit mass at a point in a gravitational field. For a uniform field the equation is F/m, where F is the force experienced by the body and m is the mass of the body. For a radial field, the gravitational field strength obeys an inverse square law. The equation for it is g=GM/r^2. You can see how the gravitational field strength would decrease the further you were from the centre of the body producing the field. This formula can be used to work out the masses of celestial bodies. For example, given that the gravitational field strength on the earth’s surface is 9.81 N/kg and the radius of the earth is 6400km, we can work out the mass of the earth to be 6.02x10^24kg. When considering planetary motion, the gravitational force acting on the body orbiting is equal to the centripetal force because the force acts perpendicular to the direction of motion. By equating the two formulas and using the formula for the speed of an object in circular motion we get the equation T^2=(4π^2/GM)r^3. Where T is the orbital period in seconds and r is the distance between the centres of mass of the orbiting body and body being orbited. This equation shows Kepler’s third law which states that the T^2 is directly proportional to r^3. This also suggests that for a set of celestial bodies (e.g. the planets of our solar system) orbiting the same large body (e.g. the sun), T^2/r^3 is a constant and is equal for all the celestial bodies. For example, given that it takes 365 days for the Earth to orbit the sun and that the distance of the earth from the centre of the sun is 1.5x10^11m. We can work out the mass of the sun to be about 2.00x10^30kg. Given that the orbital period of mars is 687 days, we can use the Earth’s orbital characteristics to work how far Mars is from the centre of the Sun as being 2.29x10^11m. A geostationary orbit is an orbit around the Earth whose orbital period is 24 hours. They are located above the equator and are always vertically above the same point on the surface of the Earth. This makes them useful for TV satellites because the dishes can be pointed to a fixed point in the sky. Which is quite convenient I’d say. References: 1. CGP AS & A2 Physics for OCR A, ISBN: 9781847624192

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5:38

Gravitational Field Strength

025 - Gravitational Field Strength In this video Paul Andersen explains how the gravitati...

published: 22 Jun 2014

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Gravitational Field Strength

Gravitational Field Strength

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• published: 22 Jun 2014
• views: 166271

025 - Gravitational Field Strength In this video Paul Andersen explains how the gravitational field strength is directly related to the mass of the object and indirectly related to the square of the distance from the center of mass. The equation for gravitational field strength was discovered by Sir Isaac Newton and contains a gravitational constant. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Music Attribution Title: String Theory Artist: Herman Jolly http://sunsetvalley.bandcamp.com/track/string-theory All of the images are licensed under creative commons and public domain licensing: "File:GRACE Globe Animation.gif." Wikipedia, the Free Encyclopedia. Accessed May 22, 2014. http://en.wikipedia.org/wiki/File:GRACE_globe_animation.gif. "Gravity and Orbits." PhET. Accessed May 22, 2014. http://phet.colorado.edu/en/simulation/gravity-and-orbits. Sjlegg. English: Gravitational Field Lines and Equipotentials (red) around the Earth., May 9, 2009. Own work. http://commons.wikimedia.org/wiki/File:Gravitational_field_Earth_lines_equipotentials.svg.

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17:34

How Gravity Actually Works

The General Theory of Relativity tells us gravity is not a force, gravitational fields don...

published: 09 Oct 2020

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How Gravity Actually Works

How Gravity Actually Works

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• published: 09 Oct 2020
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The General Theory of Relativity tells us gravity is not a force, gravitational fields don't exist. Objects tend to move on straight paths through curved spacetime. Thanks to Caséta by Lutron for sponsoring this video. Find out more at: https://www.lutron.com/veritasium Huge thanks to Prof. Geraint Lewis for hours of consulting on this video so I could get these ideas straight in my own brain. Check out his YouTube channel: https://ve42.co/gfl or his books: https://ve42.co/GFLbooks Amazing VFX, compositing, and editing by Jonny Hyman 2D animations by Ivy Tello Filmed by Steven Warren and Raquel Nuno Special thanks to Petr Lebedev for reviews and script consultation Music by Jonny Hyman and from Epidemic Sound https://epidemicsound.com Rocket made by Goodnight and Co. Screen images in rocket by Geoff Barrett Slow motion rocket exhaust footage from Joe Barnard at BPS.Space https://www.youtube.com/channel/UCILl8ozWuxnFYXIe2svjHhg

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11:16

Discovery That Changed Physics! Gravity is NOT a Force!

Discovery That Changed Physics! Gravity is NOT a Force! ► Subscribe: https://goo.gl/r5jd1F...

published: 14 Sep 2022

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Discovery That Changed Physics! Gravity is NOT a Force!

Discovery That Changed Physics! Gravity is NOT a Force!

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Discovery That Changed Physics! Gravity is NOT a Force! ► Subscribe: https://goo.gl/r5jd1F Gravity is one of the four fundamental forces of nature in the Universe. But of the four forces of nature, it stands alone as different. In fact, gravity isn’t the force you think it is, and perhaps it's not a force at all. If you think you understand gravity, then get ready to change the way you think about gravity…forever. We are on social media: www.facebook.com/destinymediaa www.instagram.com/destiny.media.yt/ The Destiny voice: www.TomsVoiceovers.co.uk Sourses: https://pastebin.com/raw/pcZGVx2S

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8:11

Gravitational Field Introduction

The gravitational field is introduced and illustrated. For a constant field and a non-cons...

published: 28 Jan 2018

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Gravitational Field Introduction

Gravitational Field Introduction

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• published: 28 Jan 2018
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The gravitational field is introduced and illustrated. For a constant field and a non-constant field around a spherical object. Want Lecture Notes? http://www.flippingphysics.com/gravitational-field.html This is an AP Physics 1 topic. 0:00 The two force of gravity equations 0:55 The constant gravitational field equation 2:25 Gravitational Field Lines 3:16 What is a gravitational field? 4:33 The gravitational field equation around a spherical object 5:48 Drawing the field lines around a spherical object 7:02 Are gravitational field lines real? Next Video: Universal Gravitational Potential Energy Introduction http://www.flippingphysics.com/universal-gravitational-potential-energy.html Multilingual? Please help translate Flipping Physics videos! http://www.flippingphysics.com/translate.html Previous Video: Number of g's or g-Forces Introduction http://www.flippingphysics.com/g-forces.html Please support me on Patreon! http://patreon.com/FlippingPhysics Thank you to Tony Dunn, Christopher Becke and Jonathan Everett for being my Quality Control Team for this video. http://flippingphysics.com/quality-control.html Thank you to Youssef Nasr for transcribing the English subtitles of this video.

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5:11

GCSE Physics - Gravity, Weight and GPE #3

This videos covers: - What gravity is - What the strength of gravity depends on - How to c...

published: 16 Jun 2019

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GCSE Physics - Gravity, Weight and GPE #3

GCSE Physics - Gravity, Weight and GPE #3

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• published: 16 Jun 2019
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This videos covers: - What gravity is - What the strength of gravity depends on - How to calculate weight - How to calculate gravitational potential energy General info: - You need to memorise the equation for gravitational potential energy - Suitable for all GCSE and IGCSE courses Exam board specific info: AQA - Everything is relevant to your course! IGCSE Edexcel - Everything is relevant to your course! Edexcel - Everything is relevant to your course! OCR 21st Century - Everything is relevant to your course! OCR Gateway - Everything is relevant to your course!

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1:01

Gravitational field inside earth| #jee #neet #boardexam

published: 04 Aug 2024

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Gravitational field inside earth| #jee #neet #boardexam

Gravitational field inside earth| #jee #neet #boardexam

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• published: 04 Aug 2024
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22:35

A Level Physics Revision: All of Gravitational Fields (in under 23 minutes)

Join my free Physics Newsletter: https://zphysicslessons.net/about My Gravitation Workboo...

published: 29 Nov 2020

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A Level Physics Revision: All of Gravitational Fields (in under 23 minutes)

A Level Physics Revision: All of Gravitational Fields (in under 23 minutes)

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Join my free Physics Newsletter: https://zphysicslessons.net/about My Gravitation Workbook: https://koji.to/k/9Jut My Physics Workbooks: https://zphysicslessons.net/my-workbooks Gravitation Past Paper Questions Solutions: https://youtu.be/pUsTwN5NgzI Chapters: 00:00 Intro 00:33 Gravitational Fields and Lines 03:10 Newton's Law of Gravitational Attraction 04:27 Gravitational Field Strength 05:48 Kepler's Laws 08:33 Proof of Kepler's Third Law 10:55 Geostationary Orbits 12:07 Height of a geostationary orbit 16:18 The gravitational potential and potential energy

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Gravitational constant

The gravitational constant, approximately 6989667400000000000♠6.674×10⁻¹¹ N⋅m²/kg² and denoted by the letter G, is an empirical physical constant involved in the calculation(s) of gravitational force between two bodies. It usually appears in Sir Isaac Newton's law of universal gravitation, and in Albert Einstein's general theory of relativity. It is also known as the universal gravitational constant, Newton's constant, and colloquially as Big G. It should not be confused with "small g" (g), which is the local gravitational field of Earth (equivalent to the free-fall acceleration).

Laws and constants

According to the law of universal gravitation, the attractive force (F) between two bodies is directly proportional to the product of their masses (m₁ and m₂), and inversely proportional to the square of the distance, r, (inverse-square law) between them:

The constant of proportionality, G, is the gravitational constant.

The gravitational constant is a physical constant that is difficult to measure with high accuracy. In SI units, the 2014 CODATA-recommended value of the gravitational constant (with standard uncertainty in parentheses) is:

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This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Gravitational_constant

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