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A body is projected horizontally from a ...

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

A

`10 hati -30 hatj`

B

`10 hati+30 hatj`

C

`20 hati-30hatj`

D

`10 hati+10 sqrt(3) hatj`

Text Solution

Verified by Experts

The correct Answer is:
A
`V_(x) =U" "V_(y) =- "gt"`
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