A body of mass m is kept on a rough horizontal surface (coefficient of friction = μ). A horizontal force is applied on the body, but it does not move. The resultant of normal reaction and the frictional force acting on the object is given by R, where R is,
1
|\(\vec{R}\)| ≤ mg\(\sqrt{1+\mu^{2}}\)
2
|\(\vec{R}\)| = mg
3
|\(\vec{R}\)| = mg + μmg
4
|\(\vec{R}\)| = μmg