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Questions  

A ball of mass m moving with velocity V, makes a head on elastic collision with a ball of the same mass moving with velocity 2V towards it. Taking direction of V as positive velocities of the two balls after collision are

a
-V and 2V
b
2V and -V
c
V and -2V
d
-2V and V

detailed solution

Correct option is D

Due to elastic collision of bodies having equal mass, their velocities get interchanged.

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