Physics

Problem

10\,\text{kg}

box rests on a level floor. The coefficients of friction between the box and the floor are

\mu_s = 0.30

and

\mu_k = 0.20

. A horizontal force of

25\,\text{N}

is applied to the box. What is the magnitude of the friction force acting on the box? a)

29\,\text{N}

25\,\text{N}

20\,\text{N}

4.4\,\text{N}