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A child of mass 23 kg runs with a speed of 2.13 m/s tangentially toward the...

A child of mass 23 kg runs with a speed of 2.13 m/s tangentially toward the edge of a merry-go-round. The merry-go-round has a radius 2.33 m and a moment of inertia of 278 kg m2.

She jumps on the merry-go-round, and it starts rotating.

(a) What is the girl's angular momentum relative to the axle of the merry-go-round before she jumps on it?


(b) How fast (angular speed) does the merry-go-round spin after she jumps on it?

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