A train of mass 50,000kg and velocity of 30m/s collides with a stationary carraige of mass 10,000 kg. after the collision,both the train and the carraige moves off together as one body.determine the loss of kinetic energy due to the collision?

Answer 1

momentum is conserved

50000 * 30 = (50000 + 10000) * v
...1500000 = 60000 v ... v = 25

initial KE ... 1/2 * 50000 * 30^2

final KE ... 1/2 * 60000 * 25^2