Ball A is about to hit a wall at an angle of incidence of `theta = 30^(@)`. But before hitting the wall it made a head on collision with another identical ball B. The ball B then collides with the wall. The coefficient of restitution for collision between two balls is `e_(1) = 0.8` and that between a ball and the wall is `e_(1) = 0.6`. Find the final velocity of ball B. Initial velocity of A was `u = 5 ms^(-1)`. Neglect friction.
`[tan^(-1)((2.25)/(2.34))=44^(@)]`

Answer

`3.24 ms^(-1)` making an angle of `44^(@)` with the normal to the wall