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A particle of mass m is projected with a...

A particle of mass m is projected with a velocity v making an angle of `45^@` with the horizontal. The magnitude of the angular momentum of the projectile abut the point of projection when the particle is at its maximum height h is.

A

zero initial velocity having zero acceleration

B

`(mvh)/(sqrt(2))`

C

`(mvh^(2))/(sqrt(2))`

D

none of these

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