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A ball of mass m strikes the fixed incli...

A ball of mass m strikes the fixed inclined plane after falling through a height h. if it rebounds elastically. The impulse on the ball is :

A

`2 m cos thetasqrt(2gh)`

B

`2 m cos thetasqrt(gh)`

C

`(2msqrt(2gh))/(cos theta)`

D

`2msqrt(2gh)`

Text Solution

Verified by Experts

The correct Answer is:
A
Here e=1
If ball rebound elastically
`V_(Lol)=u_(Lol)`
`:. ` Along line of impact momentum conservation
`intNdt=mv-(-m u) =mv+m u=2 m u`
Along Lol =`u_(LOL)=u cos theta `
`=sqrt(2gh) cos theta`
`J=2m cos theta .sqrt(2gh)`
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