Question

a 1250 kg car is stopped at a traffic light. A 3550 kg truck moving at 8.33 m/s hits the car from behind, if the bumpers lock how fast will the two vehicles move?

Answer 1

\[m_{1}u_{1} +m_{2}u_{2} = (m_{1}+m_{2})v\] where u is the initial velocity and v is the final velocity.