A body is floating in a liquid in a beaker. If the whole system falls freely under gravity, the upthrust on the body due to the liquid is
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 portion of the body
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Solution
The correct option is A zero When the beaker is allowed to fall freely, apparent weight of the body becomes zero i.e. body exerts no force on water. Hence no water is displaced due to weight of the body. So buoyant force i.e. upthrust will also become zero.