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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 sqrt3 mg`

B

`mg/2(3 sqrt3 -2)`

C

`1/2mg(3/sqrt3 + 2)`

D

`1/2 mg(3 - sqrt2)`

Text Solution

Verified by Experts

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