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Ответ

Ответ дан
sakuyaize

Дано:

m1=m

m2=2m

Найти: Fн2/Fн1

Решение

Так как тело находится в покое справедлива формула:

mg+Fн=0

Fн1=-m1*g

Fн2=-m2+m*g

frac{Fn2}{Fn1} =frac{-(2m+m)g}{-mg}

frac{Fn2}{Fn1} =frac{-3mg}{-mg}

frac{Fn2}{Fn1}=3

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