Answer:
13.26m/s
Explanation:
A body that moves with constant acceleration means that it moves in "a uniformly accelerated motion", which means that if the velocity is plotted with respect to time we will find a line and its slope will be the value of the acceleration, it determines how much it changes the speed with respect to time.
When performing a mathematical demonstration, it is found that the equations that define this movement are as follow
[tex]\frac {Vf^{2}-Vo^2}{2.a} =X\\[/tex]
Where
Vf = final speed
=0m/s
Vo = Initial speed
A = acceleration
=-4m/s^2
X = displacement
=22m
solving for v0
[tex]Vo=\sqrt{Vf^2-2ax} \\Vo=\sqrt{(0)^2-2(-4)(22)}\\Vo=13.26m/s[/tex]
the starting velocity of the ball is 13.26m/s
