# Question #6578f

##### 1 Answer

For a simple pendulum making a small angle

#T=2pisqrt(l/g)#

where#l# is its length and#g# is acceleration due to gravity.

Setting

Either

Physically it may not be possible to realize a pendulum with

However, there would arise situations where

it is same as running a pendulum in gravity free region,

Pendulum in a freely falling lift is an example of such a situation. In the frame of reference of lift we need to account for acceleration of so that so that Newton's Laws of motion are valid and could be applied. Hence, a pseudo force equal and opposite to downward force due to