Question

The time period of a simple pendulum can be changed by:

• A. Changing the length of the string
• B. Changing the mass of the bob
• C. Changing the quality of string or thread
• D. Moving it to a planet with different gravity

Answer 1

Answer: (A), (D)

The correct options are:

A Changing the length of the string

D Moving it to a planet with different gravity

The time period of a simple pendulum of length $l$ is given by,

$T=2\pi \sqrt{\frac{l}{g}}$

where $g$ is the acceleration due to gravity at a particular place.

Hence the time period of a simple pendulum depends on the length of the pendulum and the gravity of the planet. So, in order to change the time period of a simple pendulum, its length needs to be changed or it can be shifted to some other planet with different gravity.