Question

A 400 g ball moving with speed 5 m s–1 has elastic head-on collision with another ball of mass 600 g initially at rest. Calculate the speed of the balls after collision.

Answer 1

as its head on and elastic collision so is this the whole energy is conserved and the momentum conservation applies so
momentum initial = momentum after wards
so
400g × 5mps = (400g + 600g) velocity unknw
2000=1000×velocity unknown
2mtr per sec is the answer