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A steel ball of mass 2m suffersone-dimen...

A steel ball of mass `2m` suffersone-dimensional elastic collision with a row of three steel balls, each of mass m. If mass `2m` has collided with velocity `v` and the three balls numbered `1,2,3` were initially at `2`. rest, then after the collision

A

balls `1,2` and `3` would start moving to the right, each with velocity `v//3`

B

balls `2` and `3` would start moving to the right, each with velocity `v//2`

C

balls `2` and `3` start moving to the right, each with velocity `v`

D

ball `2` and ball of mass `2m` would remain at rest

Text Solution

Verified by Experts

The correct Answer is:
C, D

In option a neither momentum nor kinetic energy is conserved collision is not elastic. Hence, option a is not correct.
b. Same difficulty lies with option b. so only option c and d correct.
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