background: You rotate your hand by pointing your arm straight down, then bringing it up over your head without bending the elbow, and then back down again, like a fast-pitch softball pitch, and keeping the rest of the arm straight and unbent

A) It took me 15 seconds to rotate my arm five times

B) it took me 3 seconds to rotate my arm one time

C) The distance from my shoulder to my elbow is 30 cm

D) The distance from my shoulder to the middle of my hand is 60 cm

A. What was the average angular acceleration (degrees/s² and rad/s²) of the hand? How do you know? B. What was the average centripetal acceleration (m/s²) of the hand? (Hint: remember, it is going in a circle and a_cp = v²/r.)

C. Are the answers to A and B the same or different? Explain your answer