Question

how how much work is done in raising a stone of mass 5 kg to a height of 5 metre.
its answer is 245 Joule.
tell me solution ​

Answer 1

$\star$Loss of weight in water = weight in air / specific gravity = 5/3

Weight of stone in water = 5-5/3

= 10/3

Force = 10/3 x 9.8

= 98/3

Work done = 4 x 98/3

= 130.666

$\implies$130.7(appx)J

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