AP Physics C Mechanics Quiz
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ENERGY AND MOMENTUM OF ROTATING SYSTEMS
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A playground merry-go-round (uniform disk) of mass M=200 kgM = 200 \text{ kg} and radius R=2.0 mR = 2.0 \text{ m} rotates at ω=0.5 rad/s\omega = 0.5 \text{ rad/s}. A child of mass m=30 kgm = 30 \text{ kg} jumps onto the edge moving tangentially at v=3.0 m/sv = 3.0 \text{ m/s} in the same direction as the rim's motion. The rim's speed before the child jumps on is vrim=ωR=1.0 m/sv_{rim} = \omega R = 1.0 \text{ m/s}. What is the final angular velocity?
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