The load of weight W is hoisted by the pulley system and motor M. If the crate starts from rest and by constant acceleration attains a speed v after rising a distance s = s₁, determine the power that must be supplied to the motor at this instant. The motor has an efficiency ε. Neglect the mass of the pulleys and cable.

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Given: W = 50 lbf v = 15 ft S s1 = 6 ft ε = 0.76 8 = 32.2 ft 2 S