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A simple pendulum with a bob of mass 'm'...

A simple pendulum with a bob of mass 'm' swings with angular amplitude of `60^@`. When its angular displacement is `30^@`, the tension in the strings would be

A

`3 sqrt(3) mg`

B

`(mg)/(2)(3 sqrt(3)-2)`

C

`(1)/(2)mg((3)/(sqrt(3)+2))`

D

`(1)/(2)mg(3- sqrt(2))`

Text Solution

Verified by Experts

The correct Answer is:
B
`T=mg(3 cos theta-2 cos phi) ,(● = 60^0, ● = 30^0)`.
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