Four railroad cars, all with the same mass of 11300 kg, sit on a track, as shown in the figure below. A fifth car of identical mass approaches them with a velocity of 19.3 m/s (to the right). This car collides and couples with the other cars.
(a) What is the kinetic energy of car 5 before the collision?
(b) What is the kinetic energy of all five cars just after the collision?
(c) Is the energy conserved in this collision?
No
Insufficient information
Yes