If car A has a mass of and is traveling , and car B has a mass of and is traveling , what is the initial kinetic energy before the collision? What is the kinetic energy after the collision?

Could someone me find the answer to this problem.

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

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.