3. Write Newton's Second Law for the object in case (b) after release but before reaching terminal speed. (You can choose either up or down as your positive direction of your coordinate system; just be clear to state which choice you have made.) Describe how Newton's Second Law for cases (a) and (c) differs, if at all, from the equation you have written. 4. Your two laboratory partners are having a discussion about the free-body diagrams. Your rst partner argues, \"The drag force can never be as large as gravity, even at terminal speed, otherwise the object would stop in mid-air.\" Your second partner argues, \"The drag force must be larger than gravity at terminal speed since it needs to overcome gravity to make the object stop accelerating downwards.\" How do you resolve this discussion in your group? 5. Draw the velocity vector of the object (with a dashed arrow) beside each free-body diagram (on your printed sheet), being sure to indicate relative scale of velocity among the three diagrams. (Velocity doesn't belong on the free-body diagram itself since velocity is not a force.)