Question

In a simple pendulum mass of bob is $m$ and effecting length is $L$. Work done on the pendulum in one complete oscillation in gravitational field of earth is

• A. $\frac{1}{4}mgL$
• B. $\frac{1}{2}mgL$
• C. Zero
• D. $mgL$

Answer 1

Answer: (C)

Zero

It will be zero in complete one oscillation due to gravitational force because displacement of bob will be zero.