Question

A small ball slides down the quadrant of a circle as shown in fig.and hits thhe ball B of equal mass which is initially at rest.Find velocity of balls after collision.Neglect the effect of friction and assume the collision is elastic.

Answer 1

@Vincent-Lyon.Fr @yrelhan4

Answer 2

What I've learnt is that initially they are at rest,and later too,and mass is same+elastic collision..so relative velocity before collision=after collision so it should be 0?

Answer 3

Is the initial velocity of A 0?

Answer 4

Frontal elastic collision with same mass, means the moving ball comes to a stop and its velocity is transferred to the target ball.

velocity of A at bottom of quadrant is \(v=\sqrt {2gR}\)

Answer 5

The velocities will be interchanged right? So A will have B's velocity=0?

Answer 6

Ｙｅｓ．

Answer 7

So is it root 2gr or 0?:/

Answer 8

root 2gR for B and zero for A