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## Homework Statement

A .3kg ball, moving with a speed of 2.5 m/s has a head on collision with a .6kg ball initially moving away from it at a speed of 1 m/s. assuming a perfectly elastic condition, what is the speed and direction of each ball after the collision?

## Homework Equations

conservation of momentum m

_{1}v

_{i}+m

_{2}v

_{i}=m

_{1}v

_{f}+m

_{2}v

_{f}

## The Attempt at a Solution

I assumed theres no friction and assumed that the final KE is equal to the initial KE. I tryed using the conservation of momentum equation and KE_{i}=KE

_{f}but im not getting anywhere with that...