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A body of mass 4 kg is moved in a vertic...

A body of mass 4 kg is moved in a vertical circle with sufficient speed .Its tangential acceleration , when the string makes an angle of `30^(@)` with the verticle downward is `(g=10 mm/s^(2))`

A

`4 m//s`

B

`5 m//s`

C

`8 m//s`

D

`7.8 m//s`

Text Solution

Verified by Experts

The correct Answer is:
B
`F_(T)=mg sin theta `
`ma_(T)=mg sin theta `
`a_(T)=10xx sin 30`
`a_(T)=10xx(1)/(2)`
`=5m//s^(2)`
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