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12_P88InstructorSolution

12_P88InstructorSolution - 12.88 Model Model the...

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12.88. Model: Model the merry-go-round as a rigid disk rotating on frictionless bearings about an axle in the center and John as a particle. For the (merry-go-round John) + system, no external torques act as John jumps on the merry-go-round. Angular momentum is thus conserved. Visualize: The initial angular momentum is the sum of the angular momentum of the merry-go-round and the angular momentum of John. The final angular momentum as John jumps on the merry-go-round is equal to final final . I ω Solve: John’s initial angular momentum is that of a particle: JJ
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