A child swinging on a swing in sitting position, when she stands up then the time period of the swing will
Increase
Decrease
Increases of the child is long and decreases if the child is short
Remains same
A
Decrease
B
Increase
C
Remains same
D
Increases of the child is long and decreases if the child is short
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Solution
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T=2π√leff/g;leff decreases when the child stands up.
T=2π√Lg
If L is the distance between the centre of mass of the mass to the point of suspension, when the boy stands, his centre of mass is raised and L will decrease. Therefore, the time will decrease.
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