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0 votes
1.2k views
in Physics by (67.9k points)

A crane use 7000 Btu/h to raise a 200 lbm box 60 ft. How much time does it take?

1 Answer

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Best answer

Power = W = FV = mgV = mg L/t

F = mg = 200 32.174/32.174 lbf = 200 lbf 

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