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A loaded ore van has a mass of 920 kilogram and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch. The shaft is inclined at 22.0 degree above the horizontal. The van accelerates uniformly to a speed of 2.20 m/s in 15.0 second and then continues at constant speed.
(a) Find what power must the winch motor provide when the van is moving at constant speed?
W
(b) Compute what maximum power must the winch motor provide?
(c) Find what total energy transfers out of the motor by work by the time the van moves off the end of the track, which is of length 1150 meter?
J
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