Question

A lorry of mass 10,000 kg collides with the back of a car of
mass 1500 kg (see Fig. 11.90). Immediately before the
collision, the lorry was travelling at 30 m s-1, and the car
at 12 m 5-1. Find the speed of the vehicles immediately
after the collision if they remain jammed together.​

Answer 1

Answer:

inital momentum = final one

10,000(30) + 1500(12) = 10,000+ 1500(v)

300000+ 18000 = 11500×v

v = 318000/ 11500

v = 27.6 m/s