A 5.0-kg box has an acceleration of 2.0 m/s²
when it is pulled by a horizontal force across a
surface with μK = 0.50. Find the work done
over a distance of 10 cm by (a) the horizontal
force, (b) the frictional force, and (c) the net
force. (d) What is the change in kinetic energy of
the box?