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At a certain height a shell at rest expl...

At a certain height a shell at rest explodes into two equal fragments. One of the fragments receives a horizontal velocity u. The time interval after which, the velocity vectors will be inclined at `120^@` to each other is

A

`(u)/(sqrt3 g)`

B

`(sqrt3u)/(g)`

C

`(2u)/(sqrt3g)`

D

`(u)/(2sqrt3g)`

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The correct Answer is:
A
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