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Grade: 12th pass
A girl swinging on a swing in sitting position suddenly stands on it. Then period of oscillation of the swing
A. Increases                                    B. Decreases      C. Remain unchanged                   D. Becomes infinite
2 months ago

Answers : (3)

Saurabh Koranglekar
askIITians Faculty
7832 Points
2 months ago
Vikas TU
11376 Points
When athe girl stands up the centre of mass gets higher which is also the point of oscillation. As a result the effective length will decrease. Now since the time period varies with the square root of the effective length, time period will decrease.
2 months ago
24707 Points

As we learnt in

Time period of oscillation of simple pendulum -

T=2\pi \sqrt{\frac{l}{g}}

- wherein

l = length of pendulum 

g = acceleration due to gravity.




The centre of gravity shifted upwards so the length from point of suspension will decrease.

Correct option is 2.

2 months ago
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