Question

Will a body weigh more in air or in vacuum when weighed with a spring balance? Give reason for your answer.​

Answer 1

Answer:

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A body will weigh more in vacuum than in air. When a body is weighed with spring balance in air, air resistance exerts some opposing force (buoyant force) on it. Thus, measured weight will be less than its actual weight.

Answer 2

Answer:

The apparent weight of body is less in air than in vacuum. This follows from Archimedes principle , which explains the loss in weight of a body immersed in a fluid, due to the upthrust . But in vacuum, there is no upthrust and hence no loss in wieght of a body. That is why a body weighs more in vacuum than in air .