Equivalence principle question

[anuttarasammyak]

But the surface, and any region inside except at the very center, does have proper acceleration outwards from the center, just to be clear

Thanks. Now I understand forces preventing every parts of the Earth free falling and keeping the shape of the Earth provide proper acceleration. For an example when I am standing, the floor push my feet to give proper acceleration g upward. Skydivers keep zero proper acceleration while falling but will start to get proper acceleration after unfortunate crash.

 

[mucker]

Thanks for all your help everyone. On another note can I shameless link to this for some advice on what physics degree to take? https://www.physicsforums.com/threads/advice-on-type-of-physics-degree-to-do.1005630/

thanks