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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 velocity of projection after a time of (g `=10ms^(-2)`)

A

`1.6/sqrt(3) s`

B

`4/sqrt(3) s`

C

`0.6 s`

D

`1.6 sqrt(3)s `

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The correct Answer is:
A
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