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Old 09-20-2009, 06:02 PM   #1
SpyRemo

Join Date
Oct 2005
Posts
390
Senior Member
Default Need Basic Physics Help
The example works for massless gremlins capable of exerting force in a vacuum (rocket packs?).

A simpler way to understand the crate example would be to ponder the answer to this question: when you're pushing a heavy crate so that it moves with a fixed speed, you still have to keep pushing it in order for it to move at that fixed speed, don't you?
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