Question

1. A dodgem car of mass 200 kg moves with a velocity of 3 m/s. The moving dodgem collides with a stationary one of mass 180 kg.

                                               

After the collision, the 200 kg dodgem continues to move in the same direction at a speed of 1 m/s.

Calculate the speed v with which the 180 kg (second) dodgem moves to the right after the collision.

Answer 1

$$mu=mu'+Mv\\(200)(3-1)=180v\\v=2.2\frac{m}{s}$$