A cubical body (side 0.1 m and mass 0.02 kg) floats in water. It is pressed and then released so that it oscillates vertically. Find the time period of oscillation. (Density of water=103kg/m3).
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Solution
When a floating cubical body is displaced down through a small distance x, the excess buoyant force that is known as the restoring force is given as
F=−Vpg where v = volume of the excess liquid displaced = Ax