1. Comment on one concept or aspect that you learned during this unit - such as something that stands out or surprised you, or something that you can strongly relate to. Describe why it stood out or surprised you. 2. What did you most enjoy learning in this unit? Describe why you enjoyed that section. 3. What was the most challenging concept in this unit? Describe what made that concept more difficult for you. 4. On a scale of 1-10, how would you rate your participation in this unit? Why did you give yourself that score? Justify your answer by commenting on your pacing and communication.

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.