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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

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

Question Image
Grade:12th pass

3 Answers

Saurabh Koranglekar
askIITians Faculty 10341 Points
one year ago
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Vikas TU
14149 Points
one year ago
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.
Arun
25763 Points
one year ago

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.

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