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 final ω of the two disks (b) the fraction of the initial kinetic energy left in the system.
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A disk of radius R and mass M is spinning at an
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 final ω of the two disks
(b) the fraction of the initial kinetic energy left in the system.
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