Two pendulum is swinged at same time. In a certain time the first pendulum complete its 15 oscillation and 2nd pendulum completes its 10 oscillations. Calcualte the ‘ratio of their length.

Two pendulums of time periods 1.8 s and 2 s are set into oscillation at the same time. After how many seconds will the faster moving pendulum execute one complete oscillation more than the outher? How many complete oscillations will the faster moving pendulum execute during this time?

A simple pendulum completes 20 oscillations in a minute. If the diameter of its bob is 3.28 cm, what will be the length of its thread?

The effective length of a simple pendulum is 1 m. The pendulum completes 20 oscillations in 40 s. What is the value of acceleration due to gravity at that place?

The mass and diameter of a planet are twice those of the earth.What will be the period of oscillation of a pendulum on this planet,If it's a 2 second's pendulum on the earth?