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Dropped spinning disk. 2-D . A uniform disk of radius R and mass m is gently dropped onto a surface and doesn’t bounce. When it is released it is spinning clockwise at the rate . The disk skids for a while and then is eventually rolling.
a) What is the speed of the center of the disk when the disk is eventually rolling (answer in terms of g, μ, R,_ , and m)? _
b) In the transition from slipping to rolling, energy is lost to friction. How does the amount lost depend on the coefficient of friction (and other parameters)? How does this loss make or not make sense in the limit as μ→ 0 and the dissipation rate! →zero?

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