I just can’t put my head around the fact that gravity isn’t just a force
EDIT : I now get how it gets stretched and how it’s comparable to putting a ball on a stretchy piece of fabric and everything but why is *gravity* comparable to that. I guess my new question is what is gravity ? 🙂 and how can weight affect it ?
In: Physics
It comes from Einstein’s happiest thought:
Cut the cable and a man falling in an elevator, if he can’t see the world outside, would not be able to tell whether he was actually falling, or simply floating in empty space.
So if ‘free fall’ *in a* gravitational field **is the same as** sitting in empty space *with no* gravitational field, then why do we smack back into earth?
Einstein says, instead of gravity being a force, it’s a warping of space AND time, so that even though your space coordinates are stationary in space-time, **standing still** in space, the TIME coordinate brings you to the earth’s surface.
It’s not only that space is warped, it’s that time gets warped, too, so that as you progress into the future, your future trajectory in spacetime intercepts the surface of the earth.
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