0.5 kg Billard ball traveling east at 2 m/s bumps in a second pill about the same mass at rest. If the two balls bounce off each other without sticking together what is the velocity of the second ball if the first balls velocity is 0.5 m/s after the collision?

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.