Question

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?

Answers

Scott
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

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