Two identical ball bearing in contact each other and resting on a frictionless table are hit head - on by another ball bearing of the same mass moving intially with a speed c as shown in figure .

If the collision is elastic mwhich of the following (figure ) is a possible result after collision ?

Options

A.
B.
C.
D.

Answer

B

Explanation

When two bodies of equal masses collides elastically , their velocities are interchanged .
When ball 1 collides with ball -2 ,then
`v_(1)=0 and v_(2)=v`
Similarly , when ball 2 collides with ball 3, `v_(2)=0 and v_(3) = v`