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A 4.0-mm-diameter playground merry-go-round, with a moment of inertia of 400 kg⋅m2kg⋅m2 is freely rotating with...

A 4.0-mm-diameter playground merry-go-round, with a moment of inertia of 400 kg⋅m2kg⋅m2 is freely rotating with an angular velocity of 2.5 rad/srad/s . Ryan, whose mass is 75 kgkg , runs on the ground around the outer edge of the merry-go-round in the opposite direction to its rotation. Still moving, he jumps directly onto the rim of the merry-go-round, bringing it (and himself) to a halt.

How fast was Ryan running when he jumped on?

How fast was Ryan running when he jumped on?

6.7 m/sm/s
1.3 m/sm/s
2.7 m/sm/s
8.7 m/sm/s
13 m/sm/s
0 0
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Answer is =6.7 m/s

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