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Two seconds after projection, a projecti...

Two seconds after projection, a projectile is travelling in a direction inclined at `30^@` to the horizontal. After one more second, it is travelling horizontally. Find the magnitude and direction of its velocity.

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The correct Answer is:
6
Let angle made by `overset rarr upsilon ` initially and after time t be `theta` and `alpha` respectively.
`tan 30^(@)=(u sin theta-g xx2)/(u cos theta)..........(i)`
`tan 0^(@)=(u sin theta-g xx 3)/(u cos theta)............(ii)`
`therefore theta = 60 ^(@)`
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