148_Dynamics 11ed Manual

148_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 13 t C 2 s C a = t C 1.54 s = t D 2 s D a = t D 2.32 s = Problem 13-3 A bar B of mass M 1 , originally at rest, is being towed over a series of small rollers. Determine the force in the cable at time t if the motor M is drawing in the cable for a short time at a rate v = kt 2 . How far does the bar move in time t ? Neglect the mass of the cable, pulley, and the rollers. Given: kN 10 3 N = M 1 300 kg = t 5s = k 0.4 m s 3 = Solution: vk t 2 = v 10 m s = a 2 kt = a 4 m s 2 = TM 1 a = T 1.2 kN = d 0 t t 2 d = d
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