Solved: A 450-kg piano is being unloaded from a truck by

Chapter , Problem 85

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A 450-kg piano is being unloaded from a truck by rolling itdown a ramp inclined at 22. There is negligible friction andthe ramp is 11.5 m long. Two workers slow the rate at whichthe piano moves by pushing with a combined force of1420 N parallel to the ramp. If the piano starts from rest,how fast is it moving at the bottom?

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