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The 8 kg disk has an angular velocity of w 20 rad/s. If the brake ABC is applied such that the magnitude of force P

The 8 kg disk has an angular velocity of w 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 kinetic friction at B is μ k = 0.5. Neglect the thickness of the brake. 


500 mm 500 mm 200 mm P(N) 400 m +(s)

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