275_Dynamics 11ed Manual

275_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 14 v 1 a c t 1 = v 1 6 m s = PF v 1 = P 35.4 kW = Problem 14-54 The crate has mass m c and rests on a surface for which the coefficients of static and kinetic friction are μ s and k respectively. If the motor M supplies a cable force of F = at 2 + b , determine the power output developed by the motor when t = t 1 . Given: m c 150 kg = a 8 N s 2 = s 0.3 = b 20 N = k 0.2 = t 1 5s = g 9.81 m s 2 = Solution: Time to start motion 3 at 2 b + () s m c g = t 1 a s m c g 3 b = t 3.99 s = Speed at t 1 3 2 b + k m c g m c a = m c t v d d = v t t 1 t 3 m c 2 b + k g d = v 1.70 m s = P
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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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