If an ivory ball of mass 2m moving with a velocity .v. strikes head on to a close row of three identical ivory balls each of mass m as shown in the figure. Then after the colisions which may be assumed as elastic, which of the following would occur?

If an ivory ball of mass 2m moving with a velocity .v. strikes head on

1.	If an ivory ball of mass 2m moving with a velocity .v. strikes head on to a close row of three identical ivory balls each of mass m as shown in the figure. Then after the colisions which may be assumed as elastic, which of the following would occur?
Answer» The BALLS numbered 2 and 3 will move with VELOCITY v, the OTHERS staying at rest. The ball numbered 3 will move with velocity `2v_(s)` all others staying at rest. The ball numbered 3 MOVES with velocity 4v/3 and the striking ball moves with velocity v/3 The balls numbered 1, 2 and 3 move with velocity v/3 and the striking ball STOPS dead. Answer :C