With what minimum speed must you toss a 120 g ball straight up to just touch the 15-m-high roof of the gymnasium if you release the ball 1.7 m above the ground? solve this problem using energy. with what speed does the ball hit the ground?

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.