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Biology, 20.12.2019 20:31 hdhdhd49jdhd
You push a heavy crate. at first it doesn't move. you push harder, and it finally starts to move, but you still have to exert some force to keep it moving at a constant velocity. explain
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You push a heavy crate. at first it doesn't move. you push harder, and it finally starts to move, bu...
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