Ken and all the others are correct. If you want proof, see
this video clip. They mounted a fan on top of a skateboard, and as the skateboard began to gain velocity, the paper underneath the skateboard was pulled backwards at the same velocity in the other direction. The skateboard continued to accelerate, just as normal.
Here is another good way to think of this problem, as it was posted by an unregistered user on
another forum:
Quote:
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If you still don't get it - imagine you are wearing a pair or rollerskates and you're standing still on a conveyer belt which isn't moving and you are holding a rope tied to a distant tree. You start to pull on the rope with sufficient force to pull you forward at 5mph. The conveyer belt instantly moves at 5mph in the opposite direction. Does that stop you moving closer to the tree? NO. You continue to move at 5mph and the wheels rotate at the equivalent of 10mph.
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