Current Attempt in Progress There are two horizontal forces on the 2.2 kg box in the overhead view of the figure but only one (of magnitude F1 = 20 N) is shown. The box moves along the x axis. For each of the following values for the acceleration ax of the box, find the second force, with sign indicating direction: (a) 11 m/s2, (b) 23 m/s2, (c) 0, (d) -11 m/s2, and (e) -23 m/s2. (a) Number Units (b) Number Units (c) Number Units (d) Number Units (e) Number Units