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Archimedes' Principle

A body floats...

Question

A body floats in a liquid contained in a beaker. The whole system as shown in figure falls freely under gravity. The upthrust on the body is

A

Equal to weight of the liquid displaced

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B

Equal to the body weight in air

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C

Equal to the weight of the immersed portion of the body

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D

Zero

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Solution

The correct option is D Zero
In free fall, the apparent weight of the system is zero. Upthrust is equal to the weight of water displaced and displacement happens due to weight which is '0'.
Thus, upthrust will also be zero.

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