. What is the player's pitching speed?

Question

A ball player wishes to determine pitching speed by throwing a ball horizontally from an elevation of 5 m above the ground. The player sees the ball land 20 m down range. What is the player's pitching speed?

Answer 1

First calculate how long it will take for the ball to fall 

It was elevation of 5m 

since

d(distance)=1/2× a(acceleration)×t²

5= 1/2×9.8×t²

t=1.02 s

for horizontal movement

d(distance)=V(velocity)×t

so

20=V×1.02

so

V=19.6 m/s