Question

A boy is sitting on a swing. Another boy sits by his side. What will be the effect on the periodic time.
(a) increases
(b) decreases
(c) unchanged
(d) first increases then decreases​

Answer 1

Answer:

Time period of oscillation of simple pendulum -

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

- wherein

l = length of pendulum

g = acceleration due to gravity.

The centre of gravity shifted upwards so the length from point of suspension will decrease.

Correct option is 2.

Option 1)

increase

This is an incorrect option.