A) One ball from the right end will move on with speed 2v, all the other remains at rest.
B) Two balls from the extreme right will move on with speed v each and the remaining balls will be at rest.
C) All the balls will start moving to right with speed \[v/8\]each.
D) All the six balls originally at rest will move on with speed \[v/6\] each and the two incident balls will come to rest.
Correct Answer: B
Solution :
[b] For elastic head-on collision of equal masses, velocities get exchanged after the collision.
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