Physics

Problem

5\,\text{kg}

block lies on a horizontal table (

g=9.8\,\text{m\,s}^{-2}

). The coefficients of friction are

\mu_s=0.30

and

\mu_k=0.25

. In the graph of frictional force

f

versus applied horizontal force

F

, the constant value represented by the horizontal part of the curve after the block begins to slide is a)

14.7\,\text{N}

9.8\,\text{N}

12.3\,\text{N}

13.5\,\text{N}