Calculate the initial velocity of a ball thrown vertically into the air reaching a maximum
height of 20 m. (Don't forget: at maximum height the final velocity is zero and the
acceleration is -10 m/s²)

The initial velocity of the ball thrown vertically into the air reaching a maximum height is 20 m/s.What is velocity?Velocity can be defined as the ratio of displacement to time.To calculate the initial velocity of the ball, we use the formula below.Formula:v² = u²+2gh............... Equation 1Where:v = Final velocityu = Initial velocityg = Acceleration due to gravityh = HeightFrom the question,Given:v = 0 m/sg = -10 m/s²h = 20 mSubstitute these values into equation 10² = u²+[2×20×(-10)]-u² = -400u² = 400u = √400u = 20 m/sHence, the initial velocity of the ball is 20 m/s.Learn more about velocity here: https://brainly.com/question/24739297#SPJ1