Chapter 5, Problem 3Q

In Fig. 5-21, forces ${\stackrel{\to }{F}}_1$ and ${\stackrel{\to }{F}}_2$ are applied to a lunchbox as it slides at constant velocity over a frictionless floor. We are to decrease angle θ without changing the magnitude of ${\stackrel{\to }{F}}_1$. For constant velocity, should we increase, decrease, or maintain the magnitude of ${\stackrel{\to }{F}}_2$?

Figure 5.21 Question 3.