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A simple pendulum of mass 'm' , swings w...

A simple pendulum of mass 'm' , swings with maximum angular displacement of `60^(@)` . When its angular displacement is `30^(@)` ,the tension in the string is

A

Less than mg `cos 30^(@)`

B

Equal to `mg cos 30^(@)`

C

Greater than `mg cos (30^(@)`

D

Zero.

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