Question

The work done by the tension in the string of a simple pendulum during one complete oscillation is equal to:

• A. Total energy of the pendulum
• B. KE of the pendulum
• C. PE of the pendulum
• D. Zero

Answer 1

The correct option is D

Zero

$\overline{F}\perp \overline{S}\Rightarrow W=0$

(Since the instantaneous displacement of the bob and the tension are always perpendicular to each other)