The acceleration due to gravity on the surface of moon is $1.7 \;ms ^{-2}$. What is the time period of a simple pendulum on the surface of moon if its time period (in $sec$) on the surface of earth is $3.5\; s ?( g$ on the surface of earth is $9.8\; ms ^{-2} )$
If two persons sitting on a swing instead of one, why the periodic time does not changed ?
A simple pendulum is attached to the roof of a lift. If time period of oscillation, when the lift is stationary is $T$. Then frequency of oscillation, when the lift falls freely, will be
What effect occurs on the frequency of a pendulum if it is taken from the earth surface to deep into a mine
The ratio of frequencies of two pendulums are $2 : 3$, then their length are in ratio