A 20-kg block slides down a fixed rough curved track The block has a speed of 5 0 m/s after its height above a horizontal surface has decreased by 1.8 m. Assume the block starts from rest. How much work is done on the block by the force of friction during this descent?
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A 20-kg block slides down a fixed rough curved track The block has a speed of 5 0 m/s after its heig...
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