Question

the time period of a pendulum is 1.98 seconds how will its time be affected if the mass of its bob is doubled keeping its length same

Answer 1

NO CHANGE IN TIME PERIOD.

Explanation :

In a Simple Pendulum, Time period does not depend upon the mass of the bob.

The Time period is directly proportional

to the square root of l (length) and inversely proportional to g (acceleration due to gravity).

$T = k\sqrt{ \frac{l}{g} }$

Where k = 2π (proportionality constant)

Hence,

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

Hence Time period is independent of the mass of bob.

Hope this helps :)