A cockroach of mass m lies on the rim of a uniform disk of mass 7 m that can rotate freely about its center like a merry-go-round. Initially the cockroach and disk rotate together with an angular velocity of 0.324 rad/s. Then the cockroach walks halfway to the center of the disk. (a) What then is the angular velocity of the cockroach-disk system? (b) What is the ratio K/KO of the new kinetic energy of the system to its initial kinetic energy? 0.389 (a) w = rad/s v [0.832 (b) K/KO =

College Physics
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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 cockroach of mass m lies on the rim of a uniform disk of mass 7 m that can rotate freely about its center like a merry-go-round. Initially the cockroach and disk rotate together with an angular
velocity of 0.324 rad/s. Then the cockroach walks halfway to the center of the disk.
(a) What then is the angular velocity of the cockroach-disk system?
(b) What is the ratio K/Ko of the new kinetic energy of the system to its initial kinetic energy?
0.389
(а) о %3D
rad/s
0.832
(b) к/Ко
Transcribed Image Text:A cockroach of mass m lies on the rim of a uniform disk of mass 7 m that can rotate freely about its center like a merry-go-round. Initially the cockroach and disk rotate together with an angular velocity of 0.324 rad/s. Then the cockroach walks halfway to the center of the disk. (a) What then is the angular velocity of the cockroach-disk system? (b) What is the ratio K/Ko of the new kinetic energy of the system to its initial kinetic energy? 0.389 (а) о %3D rad/s 0.832 (b) к/Ко
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