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A particle is thrown with speed u at an ...

A particle is thrown with speed `u` at an angle `alpha` with horizontal from the ground. After how much time, the velocity of particle will make an angle `beta` with horizontal.

A

`u cos alpha`

B

`u cos alpha "sec" beta`

C

`u cos alpha cos beta`

D

`u sec alpha cos beta`

Text Solution

Verified by Experts

The correct Answer is:
b
`u cos alpha=v cos beta`
`v =(u cos alpha sec beta)`
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