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 = mu Mg`

`Mg le F le Mg sqrt(1 + mu^(2))`

`Mg ge F ge Mg sqrt(1 + mu^(2))`

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