Question

What is the effect on the time period of a simple pendulum if the mass of the bob is doubled?

• A. Halved
• B. Doubled
• C. Becomes $8$ times
• D. No effect

Answer 1

Answer: (D)

No effect

Answer 2

Time period of a simple pendulum, $T = 2\pi \sqrt{\frac{L}{g}}$ It means $T$ is independent of mass of the bob $m$. Hence, if mass is doubled, $T$ will not change.