Two identical ball bearings in contact with each other and resting on a frictionless table are hit heat-on by another ball bearing of the same mass moving initially with a speed `V` as shown in figure.

If the collision is elastic, which 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 velocity of ball-1, `v_(1)` becomes zero and velocity of ball-2, `v_(2)` becomes v, i.e., similarly.
`v_(1) = 0 rArr v_(2) = v`
When ball 2 collides will ball 3
`v_(2) = 0, v_(3) = v`