Chapter 3.2, Problem 2fT

For motion 2, draw vectors in region II of the enlargement that represent the initial and the final momentum of the ball. Draw these vectors using the same scale that you need for motion I (i.e., the relative lengths should represent the relative magnitudes). Use these vectors to construct the change in momentum vector $\Delta \stackrel{\to }{p}$ for motion 2.

How should the direction $\Delta \stackrel{\to }{p}$ compare to the direction of the net force on the ball as it rolls down the ramp? If necessary, modify your diagram to be consistent with the impulse-momentum theorem.