A girl is swinging on a swing in sitting position. How will the time, period of swing change if the girl stands up?

Solution

The swinging girl can be considered as a simple pendulum.
The time period of oscillation of simple pendulum is,

straight T equals 2 straight pi square root of straight L over straight g end root

where,
L is the length of simple pendulum.
Length of the simple pendulum is equal to distance from point of suspension to CG of the oscillating body.
When the girl stands up, the distance of CG from the point of suspension decreases. Therefore, time period of oscillation also decreases.

Some More Questions From Mechanical Properties of Fluids Chapter

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Mechanical Properties Of Fluids

A girl is swinging on a swing in sitting position. How will the time, period of swing change if the girl stands up?

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