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A ball is thrown with a velocity of u ma...

A ball is thrown with a velocity of `u` making an angle `theta` with the horizontal. Its velocity vector normal to initial vector `(u)` after a time interval of

A

`(usin theta)/g`

B

`u/(g cos theta)`

C

`u/(g sin theta)`

D

`(u cos theta)/g`

Text Solution

Verified by Experts

The correct Answer is:
C
`vecu=(ucostheta)hati+(usintheta)hatj`
`vecv=(ucostheta)hati+(usintheta-"gt")hatj,vecu.vecv=0`
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