A) \[-V\]and 2V
B) 2V and \[-V\]
C) V and \[-2V\]
D) \[-2V\]and V
Correct Answer: D
Solution :[d] Initial velocities of balls are \[+V\]and\[-2V\], respectively, and we know that for given condition velocities get interchanged after collision .So the velocities of two balls after collision are \[-2V\]and V, respectively.
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