We have ignored air resistance in our work so far. The plots linked in the Homework Presentation topic (HW-7-Plot-1 and HW-7-Plot-2) show velocity vs time plot for an object that does experience significant drag. (a) Explain how you know that acceleration isn't constant for this object's motion. (b) Calculate the slope of the two tangent lines on Plot 2. What does the slope at these two points tell us? (c) What final value does the velocity appear to be approaching? This velocity is called terminal velocity. Answer(s): at t = 2.00 s: slope = 3.01 m/s2, at t = 5.00 s: slope = 0.533 m/s2, ~16.5 m/s