Question

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

Answer 1

1. A body experiences an upthrust in liquid or air and there is a loss in weight of the body which is equal to the weight of the air or liquid displaced by the body.
2. When a body is placed in a vacuum it will weigh more since in a vacuum there is no upthrust acting on the body.
3. But in the case of air, there is an upthrust which will decrease the weight and the body will weigh less.