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Q.

When you stand on a weighing machine your mass reading is $42 kg$ .

Is it true that, your mass is more or less than $42 kg$ ?

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a

True

b

False

answer is A.

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Detailed Solution

The given statement is true.
When we stand on a weighing machine, our weight acts downwards due to gravity, while Upthrust (buoyant force) due to air acts upwards. We as a body, move the volume of the air as we stand upon the weighing machine. This ascending force is the buoyant force. As a consequence, the body gets pushed slightly upwards, causing the weighing machine to show a value less than the actual value. Thus, the actual mass will be more than

42 kg

.

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