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

Find the work done in lifting a stone of mass 10kg and specific gravit

1.	Find the work done in lifting a stone of mass 10kg and specific gravity 3 from the bed of a lake to a height of 6m in water.
Answer» Solution :Mass of STONE= 10kg, Specific GRAVITY `=(d_(s))/(d_(w))= 3` `W= mgh (1- (d_(w))/(d_(s)))= 10 xx 9.8 xx 6 xx (1- (10/(3))` `W= 98 xx 6 xx (20/(3) = 392J`