A girl is swinging on a swing in sitting position. When the same girl stands up, the period of swing will
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UPSC Civil Services preparation
- Abe shorterCorrect
- Bbe longer
- Cdepend on the height of the girl
- Dnot change
Explanation
The correct answer is A because the time period of a swing depends on the effective length of the pendulum. The length is measured from the point of suspension to the center of gravity of the person.
When the girl stands up, her center of gravity shifts upwards. This decrease in the distance from the pivot point reduces the effective length of the swing. According to the laws of physics, a shorter pendulum length results in a shorter time period, causing the swing to move faster. Therefore, the period of the swing will be shorter.
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