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Find the work done in lifting a stone of...

Find the work done in lifting a stone of mass 10 kg and specife gravity 3 from the bed of a lake a height of 6 m in water.

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Mass of stone = 10 kg , Specific gravity `= (d_(s))/(d_(w))=3`
`W=mgh(1-(d_(w))/(d_(s)))=10xx9.8xx6xx(1-(1)/(3))`
`W=98xx6xx(2)/(3)=392 J`
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