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A particle is thrown with a speed is at ...

A particle is thrown with a speed is at an angle `theta` with the horizontal. When the particle makes an angle `phi` with the horizontal, its speed changes to v, then

A

` u cos alpha `

B

`u cos alpha.sec beta`

C

` u cos alpha.cos alpha`

D

` u sec alpha.cos beta`

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The correct Answer is:
B
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AAKASH INSTITUTE ENGLISH-MOTION IN A PLANE-Assignement section -B Objective (one option is correct)
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