Q. In a seconds pendulum, mass of the bob is 30 g. If it is replaced by 90 g mass, then its time period will be
A) 1 s
B) 2 s
C) 4 s
D) 3 s
Explanation
(b) Time period of simple pendulum
$T = 2\pi\sqrt{\frac{l}{g}}$
From this formula it can be predicted that time period does not depend on the mass of bob.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.