Mike shoots a large marble (marble a, mass: 0.05 kg) at a smaller marble (marble b, mass: 0.03 kg) that is sitting still. marble a was initially moving at a velocity of 0.6 m/s, but after the collision it has a velocity of −0.2 m/s. what is the resulting velocity of marble b after the collision? be sure to show your work for solving this problem along with the final answer

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.