A cylindrical platform with mass M=80 kg and radius R=2 m
QUESTION
A cylindrical platform with mass M=80 kg and radius R=2 m can rotate without frictionabout its vertical cylinder axis. The platform is rotating with angular velocity ω=5 s-1when a boy with mass m=40 kg hops gently onto it.(a) Calculate the angular velocity of the platform after the boy has settled down at adistance r=1.5 m from its center.(b) Calculate how much mechanical energy was dissipated during the event.
ANSWER:
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