124_Dynamics 11ed Manual

124_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 12 Solution: v A v = L 1 s A 2 s C + = 0 v A 2 v C + = v C v A 2 = L 2 s B s C () s B + = 02 v B v C = v B v C 2 = v B 0.5 m s = Problem 12-174 Determine the constant speed at which the cable at A must be drawn in by the motor in order to hoist the load at B a distance d in a time t . Given: d 15 ft = t 5s = Solution: L 4 s B s A + = 04 v B v A + = v A 4 v B = v A 4
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