What is the position of centre of gravity of a hollow sphere filled with water? If some water is taken out how centre of gravity change
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Explanation:
The time period of the pendulum
T=2π
l/g
⇒T∝
l
Initially the centre of mass of the sphere is at the centre of the sphere. As the water slowly flows out of the hole at the bottom, the CM of the liquid (hollow sphere) first goes on downward and then upward. Hence, the effective length of the pendulum first increases and then decreases.
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