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On a frictionless surface, a block of ma...

On a frictionless surface, a block of mass M moving at speed v collides elastically with another block of same mass M which is intially at rest. After collision the first block moves at an angle `theta` to its initial direction and has a speed `v/3`. The second block's speed after the collision is

A

`(sqrt3)/(2)v`

B

`(2sqrt2)/(3)v`

C

`(3)/(4)v`

D

`(3)/(sqrt2)v`

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The correct Answer is:
B
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