Why a pendulum oscillates?
Channel: Sophile
Date: 2020-04-03

We know that if we raise the bob of a  pendulum to a little height and let it go, it will oscillate. But it thus accerates and to have acceleration there must be a  force acting on it. The force is gravity. But how gravity-which pulls objects down -make a pendulum to oscillate? 
You can simply make a pendulum by tying a small stone to a 1 metre long string. Its time period will be 2 seconds. Check it!