Question

A tennis ball is thrown vertically upward. It reaches the maximum height in 1.25 sec. What is the initial speed of the ball as it leaves the person's hand (m/s)? (neglect air resistance)

Answer 1

h= max

v= 0

t= 1.25

Vf= 0 at max height

vf = vi + at

0 = vi - 9.8 * 1.25

vi = 12.25 m/s