Engineering Mechanics - DynamicsChapter 18Guessω1rads=Given12kθ0212kf212Wg⎛⎝⎞⎠2a()2122+=Find=10.9rads=Problem 18-9A force Pis applied to the cable which causes the reel of mass Mto turn since it is resting on thetwo rollers Aand Bof the dispenser. Determine the angular velocity of the reel after it has made tworevolutions starting from rest. Neglect the mass of the rollers and the mass of the cable. The radiusof gyration of the reel about its center axis is kG.Given:P20 N=M175 kg=kG0.42 m=30 deg=ri250 mm=r0500 mm=a400 mm=Solution:0P22πr
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