Question

A simple pendulum is oscillating without damping. When the bob is at extreme position, acceleration vector is correctly shown by

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

All forces along the string cancel each other, hence
$T=mg\cos \theta$
Restoring acceleration as well as force is tangantial to the path of the bob of pendulum.
$F_{net}=mg\sin \theta$
$a_{net}=g\sin \theta$ along tangent