278_Dynamics 11ed Manual

278_Dynamics 11ed - Engineering Mechanics Dynamics Chapter 14 Solution 2 v a= 2s1 P= F = W Fv W a g P = 2.84 hp Problem 14-59 The load of weight W

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Engineering Mechanics - Dynamics Chapter 14 Solution: a v 2 2 s 1 = FW W g a + = P Fv ε = P 2.84 hp = Problem 14-59 The load of weight W is hoisted by the pulley system and motor M . If the motor exerts a constant force F on the cable, determine the power that must be supplied to the motor if the load has been hoisted at s = s ' starting from rest.The motor has an efficiency . Given: W 50 lbf = 0.76 = F 30 lbf = g 32.2 ft s 2 = s' 10 ft = Solution: 2 W g a = a 2 F W 1 g = a 6.44 ft s 2 = v 2 as'
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This note was uploaded on 08/16/2011 for the course EGN 3321 taught by Professor Christianfeldt during the Spring '08 term at University of Central Florida.

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