A simple pendulum of length L and mass (bob) M is oscillating in a plane about a vertical line between angular limit `-phi` and `+phi`. For an angular displacement `theta(|theta|ltphi)`, the tension in the string and the velocity of the bob are T and V respectively. The following relations hold good under the above conditions:

Options

A. `T cos theta = Mg`
B. `T-Mg cos theta = Mv^(2)//L`
C. `T+Mg cos theta = Mv^(2)//L`
D. `T = Mg cos theta`

Answer

B

Explanation

Mg cos `theta` will provide the required centripetal force.
So, `T - Mg cos theta = Mv^(2)//L`