# Explain why is it easier to lift a stone underwater than in the air?

## Answers

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According to Archimedes principle, a body when immersed in a fluid shows an apparent loss of weight which is equal to the weight of the fluid displaced by the body. So a heavy stone when under water, is acted upon by upthrust due to water , which ultimately reduces the true weight of the stone.

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force of buoyancy apply on stone.

let stone mass=m kg

so weight =mg N

but in water

weight of stone =(mg-X)N

where X is force of buoyancy

here we see why is it lift stone under water.

let stone mass=m kg

so weight =mg N

but in water

weight of stone =(mg-X)N

where X is force of buoyancy

here we see why is it lift stone under water.

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