A girl is swinging a swing in the sitting position. What will be the effect on the time period of the swing if she stand up?

Explanation

Here the distance between the point of suspension of swing and the centre of gravity of the girl swing system is called the length of pendulum. As the girl stands up, the centre of mass of the oscillating system is raised consequently in value of length of pendulum decreases and hence according to `T= 2pi sqrt((l)/(g))` time period decreases.