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A 5.8 m diameter merry-go-round is rotating freely with an angular velocity of 0.50 rad/s. Its...

A 5.8 m diameter merry-go-round is rotating freely with an angular velocity of 0.50 rad/s. Its total moment of inertia is 2400 kg·m2. Four people standing on the ground, each of 65 kg mass, suddenly step onto the edge of the merry-go-round. What is the angular velocity of the merry-go-round now?

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Conserve angular momentum

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