Question

the weight of a boy was 50 kg. it was wrongly measured 50 kg find the error percent

Answer 1

Here is the answer
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Answer 2

mass of boy (m) = 50 kg

height(h) =100m

since, boy boy doesn't move anything with his

force, work done by him is zero

work done on the body= gain in potential energy

P. E= mgh

P. E= 50×9.8×100

P. E= 40 KJ

So, potential energy gained by boy is 49KJ