Question

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 ?
A.
B.
C.
D.

Answer 1

Correct Answer - B
When two bodies of equal mass 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`.