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A rigid ball of mass m strikes a rigid w...

A rigid ball of mass m strikes a rigid wall at `60^(@)` and gets reflected without loss of speed as shown in the figure below. The value of impulse imparted by the wall on the ball will be

A

`frac(mV)(3)`

B

`mV`

C

2mV

D

`frac(mV)(2)`

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