Answer to Question #288337 in Physics for Siko

Question

A 1050 kg car has a velocity of 2,65 north.The car guys the rear of a stationary truck,and the bumpers lock together.The velocity of the car truck system immediately after the collision is 0,78 north.Calculate the mass of the truck

Answer 1

By conservation of momentum:

$$mv=(m+M)u→M=mv/u-m=2517\text{ kg}.$$