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A body is projected horizontall from a h...

A body is projected horizontall from a height of 78.4 m with a velocity `10 ms^(-1)`. Its velocity after 3 seconds is - `[g = 10 ms^(-2)]` (Take direction of projection on `vec(i)` and vertically upward direction on `vec(j)`).

A

`10 hat(i) - 30 hat(j)`

B

`10 hat(i) + 30 hat(j)`

C

`20 hat(i) - 30 hat(j)`

D

`10 hat(i) + 10 sqrt(3) hat(j)`

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The correct Answer is:
A
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