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Question

A block of mass m just floats, completely submerged in a liquid. If it is pushed down and released, then


A
It will oscillate.
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B
It will rise to the original position and stay there.
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C
It will sink.
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D
It will rise to another position and stay there.
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Solution

The correct option is C It will sink.
Since the block is just floating, completely submerged in water, forces on it are balanced i.e net force is zero.

Hence, the momentum imparted by the additional push causes the block to sink. Since there is no net force acting on it, the block will keep moving in the downward direction.

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