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A girl stands on the rim of a merry-go-round of radius 2.0 m that is not...

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Physics

A girl stands on the rim of a merry-go-round of radius 2.0 mthat is not moving. The rotational inertia of the merry-go-round(including the girl’s inertia) is 800 kg∙m2. She throws a rock ofmass 0.5 kg horizontally in a direction that is tangent to theouter edge of the merry-go-round. The speed of the rock, relativeto the ground, is 4.0 m/s. (a) What is the angular speed of themerry-go-round? (b) What is the speed of the girl?

Answer & Explanation Solved by verified expert
3.6 Ratings (352 Votes)
As no external torques are acting on the system formed by themerrygoround the girl and the rock all interaction are internalto the system the angular momentum is conservedL0 LfThe task is to write the angular momentum before and after thestone is tossedInitial stateThe girl the rock and the merrygoaround are at    See Answer
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