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)?
