Two children, A (mass 25 kg ) and B (mass 50 kg ), are playingon a merry-go-round (which you can assume is a solid disk with mass225 kg and radius 1.5m). Assume that any friction on the axle ofthe merry-go-round is negligible.
(A) A starts spinning the merry-go-round, giving it an angularvelocity of 7 rad/s, then she stops pushing it. B runs with a speedof 6 m/s directly toward the center of the merry-go-round. He jumpsand lands on the edge of the merry-go-round. What is the angularspeed of the merry-go-round once B lands on it?
(B) After landing, B walks to the center of the merry-go-round.What is the angular speed of the merry-go-round when he gets to thecenter?
(C) While B is in the center of the merry-go-round, A runs upwith a speed of 7 m/s  tangentially in the same directionthe merry-go-round is spinning, jumping onto the edge of themerry-go-round. What is the angular speed of the merry-go-roundafter A lands on it?
(D) A stays in place while B walks back to the edge of themerry-go-round. What is the angular speed of the merry-go-roundwhen he gets there?
