A horizontal 700 n merry-go-round of radius 1.24 m is started from rest by a constant horizontal force of 52.2 n applied tangentially to the merry-go-round. find the kinetic energy of the merry-go round after 2.15 s. the acceleration of gravity is 9.8 m/s2. assume the merry-go-round is a solid cylinder. answer in units of j