Afrog leaps vertically into the air and encounters no appreciable air resistance.
a. on the way up its acceleration is 9.8 upward, and on the way down its acceleration is 9.8 downward.
b. on the way up and on the way down its acceleration is 9.8 downward, and at the highest point its acceleration is zero.
c. on the way up, on the way down, and at the highest point its acceleration is 9.8downward.
d. at the highest point, it reverses the direction of its acceleration.