Question

A pendulum clock in a museum was found to lose 1 minute in every 24 hours. What corrective measure should the curator of the museum undertake?

• A. The length of the pendulum should be increased
• B. length of the pendulum should be decreased
• C. the bob should be immersed in water
• D. the mass of the bob should be increased

Answer 1

The correct option is A The length of the pendulum should be increased

Time period of the simple pendulum is given by $T=2\pi \sqrt{\frac{l}{g}}$

where $l$ is the length of the pendulum.

$⟹T\propto \sqrt{l}$

Since the pendulum clock loses 1 minute in every 24 hours, this means that time period of clock gets increased. This can happen if the length of the pendulum gets increased.