Gravity at the center of the earth

[TheAlison]

I love this video. More videos should be like this.
Audience interaction that is easy to hear, a real board that the teacher draws on which is clearly visible. It's practically perfect.

[stubdo]

I have been pondering this in the bathroom the last few days since Christmas and concluded that gravity balances out in the centre of earth due to equal pull of the earth all around you. I was glad to see you have posted this specific point to explain the same. Thanks! I also thought there would be slight unequal pulls due to the irregular shape of the earth and the pull of the sun/moon etc. but am glad to know the principle I thought is right.

[BDoggUSMC]

How is this demon writing backwards with ease?

[siddhartha]

Hello sir u really explain well but I hv doubt..n I hv to ask you this..
So aas u said the resultant of garvity pull from every direction on the centre of earth is zero but the earth is not uniformly massed I mean if you cut out planet in quadrant then u will notice that the material inside the earth is not same.. there might be some iron ore in one side but the opposite side contain petroleum then the collective mass may vary .. please reply m eagerly waiting for your response 🙏

[manuboker]

Wonderful lecturer that makes physics fun and understandable !!!

[HeadingForTomorrow]

What I would like to know is, how did this professor learn to right backwards so we can see it correctly?

[bloemkoolendestreetgang]

I swear i felt like the smartest person in the universe when i guessed it would be 0 long before he said so

[magranin]

I thought Guass's law was for enclosed surfaces (haven't taken it yet still in charge distributions but we should get to it in a week, can't wait for the double integrals which the law introduces a replacement for). But I guess since both Coloumbs law and universal gravitational law are inversly propotional with r^(2) guass's law should work perfectly well for both.

[AB-hhhm]

Wow i can listen to this giy for hours where is the whole lecture professor

[commonsense]

sir Anderson if there is no gravity at the centre of the earth then what pulls us towards the centre and if gravitational force = 0 then how the lava and all molten materials stay there without any movement. Pls answer me

[وصفونيبلمتوحد]

Please, I have a surprising question now: How can there be an acceleration due to gravity on a body at rest on the ground? We know that the acceleration of stationary bodies is zero. Can you answer this question? I apologize if there are errors in my speech because I use translation. I am an Arab researcher.

[steffenleo]

Great idea and thought behind these Video... Thanks Prof Anderson and have a nice weekend...

[yoprofmatt]

rmussel1:

Yes, it's excellent that you understand this. Well done, and keep up with the physics!

Cheers,
Dr. A

[viswa]

Prof ....what is gravity actually is ....plz ans

[planmet]

Dear Matt, If I were standing on a rocky core (say 2400 km in diameter) at the centre of the gas giant Jupiter - would the force of gravity be just the same as if I were standing on Pluto ( a planet of the same diameter)?

[winklethrall]

How is the curvature of space affected at the center?

[TheGolfdaily]

Hello Matt.

Very glad to find your great channel here!
This is something I have been wondering for years and I did guess correctly that the gravity of a planet or star must be zero at the center of it's mass.
But I have a question;
Why is it then the fussion of a star occurs at it's center where the gravity is at it's weakest? Shouldn't it happen else where?

I would very much appreciate of your feedbacks., , 🤗

[roelfbackus]

I heard another explanation. The mass (of the Earth) affects space, space-time to be precise. In the center of the earth, that space is maximally curved. A 10x10x10 m hole doesn't change that much. So if you get into that hole in the center of the earth, you will still be squeezed together by the curvature of space.

[captainjackson]

The force of gravity and the weight of an object is the same right?

[bobbybrady]

So if you dug a hole deep enough, not to the center, you should feel less gravity?