Question

The time period of a pendulum is 2.4 seconds its length is ?

Answer 1

The length is `=1.43m`

Explanation:

Apply the equation

`T=2pisqrt(l/g)`

The period is `T=2.4s`

The acceleration due to gravity is `g=9.8ms^-2`

`T^2=4pi^2l/g`

`l=(T^2g)/(4pi^2)=(2.4^2*9.8)/(4pi^2)=1.43m`