Question

The time period of the two simple pendulum of length 4 m and 25 m at the place

Answer 1

Explanation:

the formula for periodic time of a pendulum is 2.pi.sqroot(L/g)

A period of one second implies 1 = 2.pi.square root ( L/9.81)

so sqrt (L/9.81) = 1/(2.pi) and L/9.81 = 1 / 4.pi^2 and

L = 9.81 / 4.pi^2 = 0.2485 meters.

This is called a ‘half-second pendulum’.