A ball is dropped from the roof of a 25-m-tall building. What is the velocity of the object when it touches the ground? Suppose the ball is a perfect golf ball and it bounces such that the ve locity as it leaves the ground has the same magnitude but the op posite direction as the velocity with which it reached the ground How high will the ball bounce? Now suppose instead that the ball bounces back to a height of 20 m. What was the velocity with which it left the ground?

a)  

b)  

Explanation:

From the question we are told that:

Height

Bounce Height

Generally the Kinematic equation is mathematically given by

Therefore Height

b)

Generally the Kinematic equation is mathematically given by

ill do it for 100, also this isnt 80 its 40

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