Ahorizontal 800 n merry go round is a solid disk of radius 1.50 m, started from rest by a constant horizontal force of 50.0 n applied tangentially to the edge of the disk. find the kinetic energy of the disk after 3.00 s.

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.