Question

A block of mass $m$ is lying on a horizontal surface. The coefficient of friction between block and the surface is $\mu$. The minimum possible force needed to move the block on the surface is

• A. $\frac{mg}{\mu }$
• B. $\mu mg$
• C. $\frac{mg\mu }{\sqrt{1+{\mu }^2}}$
• D. $\frac{mg\sqrt{{\mu }^2+1}}{\mu }$

Answer 1

The correct option is B $\mu mg$

we have to apply force which is just greater than static friction force on body

so the required force $F=\mu .N=\mu mg$