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A projectile is thrown with a velocity o...

A projectile is thrown with a velocity of 20 `m//s,` at an angle of `60^(@)` with the horizontal. After how much time the velocity vector will make an angle of `45^(@)` with the horizontal (in upward direction) is (take g=`10m//s^(2))-`

A

`sqrt3s`

B

`(1)/(sqrt3)s`

C

`(sqrt3+1)s`

D

`(sqrt3-1)s`

Text Solution

Verified by Experts

The correct Answer is:
D
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