A body of mass M is kept n a rough horiz...

A body of mass M is kept n a rough horizontal surfasce (friction coefficient `=mu`). A person is trying to pull he body by applying a horizontal force but the body is not moving. The force by the surface on A is F, where

`F=Mg`

`F=muMgf`

`Mg le F le Mgsqrt(1+u^(2))`

`Mg ge F ge Mgsqrt(1+u^(2))`

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