3 ms·
This might be an easy question, but it's always bothered me... If gravity is caused by curvature of space-time (like I'm a train on a curved rail), doesn't tha
by ijidak 4y ago
This might be an easy question, but it's always bothered me...
If gravity is caused by curvature of space-time (like I'm a train on a curved rail), doesn't that mean that space-time itself exerts forces?
But if that's the case, why doesn't space exert a retarding force against all moving objects, like a form of friction or wind resistance?
In a total vacuum, an object would move through space-time with zero resistance forever... As if space-time is incapable of exerting any force of its own.
Why does spacetime only exert force when curved?
- nextaccountic 4y agoBut under this point of view there's no force at all. Gravity doesn't exert a force on you, the movement under gravity is purely inertial. I know this is bonkers. Here's the video that made me finally understand it https://www.youtube.com/watch?v=wrwgIjBUYVc https://www.youtube.com/watch?v=wrwgIjBUYVc (https://www.youtube.com/watch?v=twPaOtfpneo https://www.youtube.com/watch?v=twPaOtfpneo is another good video from the same author)
- ijidak 4y agoWow. Thank you so much for sharing these. These videos do make it clearer!! It finally clicks!