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A projectile is projected with linear mo...

A projectile is projected with linear momentum p making angle `theta` with the horizontal. The change in momentum of the projectile on returning to the ground will be-

A

2p

B

2p`cos theta `

C

2p`sin theta `

D

2p`tan theta `

Text Solution

Verified by Experts

In return journey ,the angle made by projectile with horizontal is `(-theta)`,hence
`Delta vec p =[hat(i)p cos theta Z+ hat (j) p sin theta ]-[ hat i p cos ( - theta)+ hat j p sin (- theta)=] hat j 2 p sin theta`
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