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Question

A body floats in a liquid contained in a beaker. The whole system as shown falls freely under gravity. The upthrust on the body due to the liquid is
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A
Zero
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B
Equal to the weight of the liquid displaced
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C
Equal to the weight of the body in air
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D
Equal to the weight of the immersed position of the body
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Solution

The correct option is A Zero
A freely falling body experiences zero weight and hence upthrust on it will also be zero. When the system falls freely, the body floating in the liquid is also in a state of free fall and therefore zero upthrust.

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