Two identical balls bearing in contact with each other and resting on a frictionless table are hit head-on by another ball bearing the same mass moving initially with a speed 
as shown in figure.
If the collision is elastic, which of the following (figure) is a possible result after collision?
Text Solution
Verified by ExpertsB
When two bodies of equal masses collide elastically, their velocities are interchanged.
When ball 1 collides with ball 2, then velocity of ball 
becomes zero and velocity of ball 
becomes 
, i.e.
Similarly, when ball 2 collides with ball 
and 
.
Hence, figure is correct.
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