Originally Posted by
Chip Monk
If the Earth stopped moving very suddenly the forces involved would rip it apart so the question is meaningless.
If that didn't happen (for some mental reason) we certainly wouldn't float off into space. Gravity has nothing whatsoever to do with whether an object is moving or not. If the Earth stopped moving suddenly then everything on it would keep moving in the same direction and speed as they were before. Think of star trek and inertial dampening. If that didn't work then when the Enterprise shot off at high speed Captain Kirk's inertia would keep him in the same place and the back wall would run into him. The same works in reverse.
Gravity is proportionate to the mass of two objects and their distance apart. So the bigger they are and the closer together the higher the force. It's not really a force as such anyway. It's more like the mass of the object warping space time around it and creating a gravity well for other things to "fall into".
Acceleration is a change in velocity. Given that velocity is vector, then either a change in speed (up or down) or a change in direction, would be acceleration. We know that Force = Mass x Acceleration, therefore Acceleration is equal to the Force being used Divided by the mass of the object.
Acceleration due to Gravity is always 9.81m/sec/sec. Therefore we also know that the force being exerted is increased as the mass of the object increases. As discussed earlier.
What was the question again.
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