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A gir pushes a merry go round until it is rotating with angular velocity of 1 rpm. The merry-go-round is a uniformly massive disc with mass M=800kg and a radius R=2m. The girl hass mass m=40kg. ( Treat the girl as a point mass)
a) The girl jumps onto the edge of the merry-go-round. What is the angular velocity of the merry-go-round after she lands?
b) The girl walks to center of the merry go round. Does the kinetic energy or the angular momentum of the merry-go-round plus girl change? If so, by how much?
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