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A ball is thrown with velocity 8 ms^(-1)...

A ball is thrown with velocity `8 ms^(-1)` making an angle `60^(@)` with the horizontal. Its velocity will be perpendicular to the direction of initial velcoity of projection after a time of `(g = 10 ms^(-2))`

A

`(1.6)/(sqrt(3))s`

B

`(4)/(sqrt(3))s`

C

0.6s

D

`1.6sqrt(3)s`

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The correct Answer is:
A
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