The crate of weight W is given speed v in time t 1 starting from rest. If
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The crate of weight W is given speed v in time t1 starting from rest. If the acceleration is constant, determine the power that must be supplied to the motor when t = t2. The motor has an efficiency ε. Neglect the mass of the pulley and cable.
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Given: W = 50 lbf ft V = 10 S t1 = 4 s t2 = 2 s ε = 0.76 8 = 32.2 ft 2 S
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