Solve the following :


A simple pendulum of length $I$ is pulled aside to make an angle $\theta$ with the vertical. Find the magnitude of the torque of the weight $w$ of the bob about the point of suspension. When is the torque zero?


rorque $=F \times d_{\perp}$

$\tau=\omega l \sin \theta$

Torque will be zero at the lowest point of suspension as $\theta$ will be zero.

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