172_Dynamics 11ed Manual

172_Dynamics 11ed - Engineering Mechanics Dynamics Chapter 13 mC g cos = mCaCA a)cos aC = aCA sin aCA cos a aCA = g a)cos aC = 6.905 m 2.905 s2 aC

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Engineering Mechanics - Dynamics Chapter 13 m C g cos θ () m C a CA a ( )cos = a CA ga + ( )cos = a C a CA sin a CA cos a + = a C 6.905 2.905 m s 2 = a C 7.491 m s 2 = Problem 13-34 The boy has weight W and hangs uniformly from the bar. Determine the force in each of his arms at time t = t 1 if the bar is moving upward with (a) a constant velocity v 0 and (b) a speed v = bt 2 Given: W 80 lb = t 1 2s = v 0 3 ft s = b 4 ft s 3 = Solution: (a) 2 T a W 0 = T a W 2 = T a 40lb = 2 T b W W g 2 bt = T b 1 2 W W g 2 1 + = T b 59.885 lb = (b) Problem 13-35 The block A of mass m A rests on the plate
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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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