Physics

Problem

A box is pulled to the right with constant velocity on a horizontal surface. The frictional force acting on the box is

6\,\text{N}

towards the left. Which one of the following additional horizontal forces will keep the box moving with the same constant velocity? a)

12\,\text{N}

to the right b)

6\,\text{N}

to the right c)

0\,\text{N}

; it will continue to move anyway. d)

6\,\text{N}

to the left