Physics

Problem

2.0\,\text{kg}

block rests on a horizontal surface with coefficients of friction

\mu_s=0.40

and

\mu_k=0.30

. A horizontal force of

6.0\,\text N

is applied to the block. What is the magnitude of the friction force acting on the block at this instant? a)

5.9\,\text N

7.8\,\text N

6.0\,\text N

4.0\,\text N