Question

A car A of mass 1500 kg is traveling at 25 m/s collides with another car B of mass 1000 kg travelling at 15 M per second in the same direction. After collision the velocity of car A becomes 20 m /sec. Calculate the velocity of car B after the collision.

Answer 1

carA speed (Sa)- 25m/s

velocity (Va) - 20m/s

carB speed (Sb) - 15m/s

velocity (Vb)-?

sa/sb=va/vb

25/15=20/x

after cross multiplying it becomes

x=20X15/25

x=12