Statement (A) : The kinetic friction is always less than static friction

Statement (B) : The kinetic friction may be less than static friction

(i) $F=f_s=0$ to $f_{ms}$body will remain at rest

(ii) $F > f_{ms}$then body will start sliding.

(iii) once it is set into motion then it experience $f_{k }> f_{ms}$.

As we go on increasing applied force on a body at rest.

            We can observe the variation of friction as shown in the graph.

Using the above information we get.

             (i) The kinetic friction $f_k$is not always less than static friction $f_s$ 

$\left(f_{s }take the values from 0 to f_{ms}\right)$       

            (ii) The kinetic friction $\left(f_k\right)$may be less than static friction $f_s$.i.e, $0<f_s<f_{ms}$