Question

A pendulum is released from rest from the point $A$ as shown in the figure. The string of the pendulum is taut. $OA$ makes an angle $30^{\circ }$ with the vertical. The acceleration of the pendulum bob at this instant would be

• A. along $\overrightarrow{AO}$
• B. along the vertical
• C. in a direction perpendicular to $OA$
• D. In a direction making an angle less than $30^{\circ }$ with the vertical

Answer 1

Answer: (C)

At $A:T=mg\cos \theta$
so acceleration $=mg\sin \theta$ perpendicular to $OA$