The ball is thrown vertically upwards from the height of 14.1 meters. It takes 3 seconds till the ball hits the ground. What is the initial speed of the ball?

Answer 1

Y = 14.1 + Vo*t -4.9*t^2

Set Y = 0 and t = 3 and solve for Vo, which is the initial vertical velocity.

Vo = [9*4.9 -14.1]/3
= 30/3 = 10.0 m/s

Answer 2

Thanks! :)