343_Dynamics 11ed Manual

343_Dynamics 11ed Manual - h of the jump if the maximum...

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Engineering Mechanics - Dynamics Chapter 15 Given energy W A h 1 2 m A v A1 2 = momentum m A v A1 m A v A2 m P v P2 + = restitution ev A1 v A2 v P2 = energy 1 2 m P v P2 2 1 2 k δ st 2 + 1 2 k δδ st + () 2 W P = v A1 v A2 v P2 Find v A1 v A2 , v P2 , , () = v A2 v P2 13.43 27.04 ft s = 2.61 ft = Problem 15-62 The man A has weight W A and jumps from rest onto a platform P that has weight W P . The platform is mounted on a spring, which has stiffness k . If the coefficient of restitution between the man and the platform is e , and the man holds himself rigid during the motion, determine the required height
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Unformatted text preview: h of the jump if the maximum compression of the spring becomes . Given: W A 100 lb = W P 60 lb = 2 ft = k 200 lb ft = g 32.2 ft s 2 = e 0.6 = Solution: m A W A g = m P W P g = st W P k = Guesses v A1 1 ft s = v A2 1 ft s = v P2 1 − ft s = h 21 ft = Given energy W A h 1 2 m A v A1 2 = momentum m A − v A1 m A v A2 m P v P2 + = restitution ev A1 v A2 v P2 − = 341...
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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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