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A body is projected with velocity 60m//s...

A body is projected with velocity `60m//s` at `30^(@)` to the horizontal.The velocity of the body after `3 seconds` is

A

`20hati+20sqrt3 hatj`

B

`30hati`

C

`10sqrt3hatj`

D

`30sqrt3hati`

Text Solution

Verified by Experts

The correct Answer is:
D
`V=u cos thetai+(u sin theta-"gt")j`
`Tantheta=(4H)/R`
`R=H_(max)`
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