A merry-go-round on a playground consists of a horizontal solid disk with a weight of 810 N and a radius of 1.51 m. A child applies a force 49.5 N tangentially to the edge of the disk to start it from rest. What is the kinetic energy of the merry-go-round disk (in J) after 2.95 s? 220.50 X What is the torque on the merry-go-round? How is it related to the angular acceleration? How can you use the angular acceleration to find the final angular speed? How is angular speed related to kinetic energy? What is the moment of inertia of a solid disk? J Need Help? Read It