A baseball is pitched to a batter, who swings and hits the ball. The ball is hit directly back to the pitcher, who makes the catch while he is still standing on the mound.
a. To describe the motion of the ball, what is the best choice for the reference point? Explain
your answer. (I point)
b. The pitcher's mound is located about 18 m from the batter. What is a good estimate for the
total distance that the ball travels? Explain your answer. (1 point)
c. What is the displacement of the ball? Explain your answer. (I point)
d. The ball is traveling at 90 mph (about 40 m/s) when it reaches home plate. If the ball travels at
this speed the whole distance from the pitcher to the batter, how many seconds does it take?
Show your work (1 point)