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Physics, 30.08.2019 03:30 mikeeway33

3.5-m-diameter merry-go-round is rotating freely with an angular velocity of 0.78 rad/s . its total moment of inertia is 1710 kg⋅m2 . four people standing on the ground, each of mass 66 kg , suddenly step onto the edge of the merry-go-round.
a. what is the angular velocity of the merry-go-round now?
b. what if the people were on it initially and then jumped off in a radial direction (relative to the merry-go-round)?

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