Question

Two simple pendulums A and B have equal length, but their bobs weigh 50 g and 100 g respectively, the ratio of their time periods is.

• A. 1:1
• B. 1:2
• C. 2:1

Answer 1

The correct option is A 1:1

Time period of a simple pendulum is given by
$T=2\pi \sqrt{\frac{L}{g}}$
where L is the length of the pendulum and g is the acceleration due to gravity on earth.
It shows time period does not depend on the mass or material of the bob. Therefore, the time periods will have ratio 1:1 as they have same length and same value of g.