598_Dynamics 11ed Manual

598_Dynamics 11ed Manual - Engineering Mechanics Dynamics...

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Engineering Mechanics - Dynamics Chapter 18 Guess ω 1 rad s = Given 1 2 k θ 0 2 1 2 k f 2 1 2 W g 2 a () 2 12 2 + = Find = 10.9 rad s = Problem 18-9 A force P is applied to the cable which causes the reel of mass M to turn since it is resting on the two rollers A and B of the dispenser. Determine the angular velocity of the reel after it has made two revolutions starting from rest. Neglect the mass of the rollers and the mass of the cable. The radius of gyration of the reel about its center axis is k G . Given: P 20 N = M 175 kg = k G 0.42 m = 30 deg = r i 250 mm = r 0 500 mm = a 400 mm = Solution: 0 P 22 π r
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