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A simple pendulum of length L swings in ...

A simple pendulum of length L swings in a vertical plane. The tension of the string when it makes an angle `theta` with the vertical and the bob of mass m moves with a speed v is (g is the gravitational acceleration)

A

`mv^(2)//L`

B

`mg cos theta + mv^(2) //L`

C

`mg cos theta - mv^(2) //L`

D

`mg cos theta`

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