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

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

[esoterica]

" today we are going to be talking about a very attractive topic..."
i see what you did there

[puddleduck]

Thanks!! I had a test on this and electric fields and got an A*, your videos and extremely useful! I'm gonna be watching the nuclear physics videos over the weekend as I have on that next week :)

[_Anti_Communist_]

Perfect Video! Paper 2 is coming soon so these types of videos do the job well. I like how you cover everything important, as I can easily follow along with my AQA textbook and everything key is mentioned by you. A textbook is good but it is an overwhelming amount of information, and videos like this one condense all the most valuable data into less than half an hour!

[chloe]

These videos are amazing, thank you. I have a test in 3 days and this has really helped!

[apple]

thank you so much for this intricately crafted video, this has genuinely helped me so much, even more then my school teachers who arent exactly the greatest...

[neuropcs]

Incredibly useful video, much appreciated!

[arcriciaslumingu]

Excellent videos please keep on the good work. Am benefiting a lot as a new A Level Physics teacher.

[umarazam]

thanks alot my class and I were having difficulty in A2 physics and this was really helpful ( recommended this channel to my whole school) thanks alot sir

[erino]

Great video thanks! Love the layout of the videos and really highlights key concepts/ equations!
What if the centre of mass/ point mass is not inside the planet/ mass? E.g like a cartoon crescent moon, would g on one side of the surface be different?

[akoterryeyong]

Your the best . 😭😭😭😭Thank you so much❤❤

[crumpet]

Are we expected to be able to recall the mass and radius of the earth? Thanks for the great video!

[Bbbbbbbbbbhhhhhhh]

Man, I’m here after struggling like hell with this topic even though I know the equations. I always have problems with how to apply them. But we did only start the subject a few days ago.

[datonebro]

Sir thank you so much my teacher glossed this topic. I would like to ask if you could be able to cover just a couple of WJEC Eduqas equations? Eg the time period of orbit related to d^3.
EDIT: includes the masses of both planets for a binary system.

[gautammorkhandikar]

As OCR do not give the value for radius and mass of the earth, can the exact values which you gave in the video be used in a question or are you required to work out these values?

[theanimationmaster]

17:06 small error, gravitation force should not be negative

[em]

When would you use gravitational potential instead of gravitational potential energy?

[plop.mp]

Hello sir,
Could you please add this to your Gravitational Fields playlist, thank you!

[kannan]

You mentioned that G.P.E is -GMm/r but later in the G.P.E=K.E part, you took the G.P.E as GMm/r, so is it supposed to be negative or positive?

[kausarlolz]

hello sir! do we need to know about low level satellites or just geostationary for ocr a?

[kannan]

What is the difference between the Point mass and the center of the Mass?