Mass being dropped on spinning disk problem NEED HELP

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jch11
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Mass being dropped on spinning disk problem NEED HELP!

1. A disk has a radius of 1.25m and a mass of 10kg. It lies flat on a smooth table and is spinning with an initial velocity of 10 rad/s about a pin at its center. A 5kg mass is dropped on it at a distance of 0.50m from its center. Find:
(Extra credit) if the coefficient of kinetic friction between the block and the disk is 0.40, determine:
i. the time while slipping























ii. the distance traveled while slipping
 
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