A ball of mass M moving with a velocity V collides head on elastically with another of same mass but moving with a velocity v in the opposite direction. After collision,
one ball comes to rest and another ball travels back with velocity 2V
the velocities are exchanged between the two balls
both the balls come to rest
both of them move at right angles to the original line of motion
A
the velocities are exchanged between the two balls
B
both of them move at right angles to the original line of motion
C
one ball comes to rest and another ball travels back with velocity 2V
D
both the balls come to rest
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Solution
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Using conservation of linear momentum we have: M1u1−M2u2=−M1v1+M2v2
MV−Mu2=−Mv+Mv2
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