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engineering mechanics planar kinetics of a rigid body impulse and momentum
1. The 12-kg disk has an angular velocity of = 20 rad/s. If the brake ABC is applied such that the magnitude of force P varies with time as shown, determine the time needed to stop the disk. The coefficient of friction at B is = 0.4.
(A): t = 13.00 s
(B): t = 5.08 s
(C): t = 7.00 s
(D): t = 8.92 s
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