A disk of radius R and mass M is spinning at an angular velocity ω0 rad/s. A non-rotating concentric disk of radius r and mass m drops on it from a negligible height (its translational kinetic energy from falling can be ignored), and the two rotate together. Find (a) the fnal ω of the two disks (b) the fraction of the initial kinetic energy left in the system

College Physics
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ISBN:9781305952300
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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A disk of radius R and mass M is spinning at an angular velocity ω0 rad/s. A non-rotating concentric disk of
radius r and mass m drops on it from a negligible height (its translational kinetic energy from falling can be
ignored), and the two rotate together. Find
(a) the fnal ω of the two disks
(b) the fraction of the initial kinetic energy left in the system

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