1. A railroad car of mass 2.50-10 kg is moving at a speed of

Last updated: 7/28/2022

1. A railroad car of mass 2.50-10 kg is moving at a speed of 4.00 m/s. It collides and couples with three other coupled railroad cars, each of the same mass as the single car and moving in the same direction with an initial speed of 2.00 m/s. (a) What is the speed of the four cars after the collision? (b) How much energy is lost in the collision? Where does this energy go?