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In the previous problem, if h=5R//2, the...

In the previous problem, if `h=5R//2`, the speed of block at the highest point is

A

`sqrt(2gR)`

B

`sqrt(gR)`

C

`zero`

D

`sqrt((gR)/(2))`

Text Solution

Verified by Experts

The correct Answer is:
B
`v_(D)^(2)=v^(2)-2gxx2_(R )=5gR-4gR`
`v_(D)=sqrt(gR)`
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