Q. If the period of oscillation of mass $m$ suspended from a spring is $2\ s,$ then the period of mass $4m$ will be
A) $1\ s$
B) $2\ s$
C) $3\ s$
D) $4\ s$
Explanation
(d) $T = 2\pi\sqrt{\frac{m}{k}} \Rightarrow \frac{T_{2}}{T_{1}} = \sqrt{\frac{m_{2}}{m_{1}}} = \sqrt{\frac{4m}{m}} = 2 \Rightarrow T_{2} = 2 \times 2 = 4s$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.