In the figure, a constant external force P = 160 N is applied to a 20.0-kg box, which is on a rough horizontal surface. While the force pushes the box a distance of 8.00 m, the speed changes from 0.500 m/s to 2.60 m/s.
The total work done to change the box kinetic energy is
Next post: Practice 7 iv.
Previous post: Practice 7 ii.
