A 3.8-m-diameter merry-go-round is rotating freely with an angular velocity of 0.80 rad/s . Its total moment of inertia is 1400 kgm² . Four people standing on the ground, each of mass 65 kg, suddenly step onto the edge of the merry-go-round.

a-What is the angular velocity of the merry-go-round now?

Express your answer using three significant figures.

b-What if the people were on it initially and then jumped off in a radial direction (relative to the merry-go-round)? Express your answer using two significant figures.

PLEASE

• Recognize the givens and the unknowns.
• Showing the equations used
• Correct numerical answer and for proper unit