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Upthrust

A wooden bloc...

Question

A wooden block is floating in a beaker having water. During the free fall of the beaker, the upthrust on the block will be ___.

A

equal to the weight of the block

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B

more than the weight of the block

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C

less than the weight of the block

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D

zero

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Solution

The correct option is D
zero

When the beaker is allowed to fall freely, the apparent weight of the body becomes zero, i.e., the body exerts no force on water. Hence, no water is displaced due to weight of the body and the buoyant force or upthrust will also be zero.

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