1. A baseball is thrown by Joey from the third floor of his home at 20.0m/s [downwards], his friend Timmy is 3.5 m below him.

a. Find how long it takes the ball to reach Timmy.

b. What velocity does the ball hit Timmy?

Thank you for the opportunity to help you with your question!

-3.5 = -20*t-1/2gt^2

4.9t^2+20t-3.5 =0

t= 0.168s

V = V0-9.8*t = -20-1.65 = -21.65

what about a question like this...

1. Rob throws a baseball upwards at 14.2 m/s. His friend, John, is sitting in a tree 4.5m above Rob.

a. Calculate how long it will take to reach John.

b. If John misses the ball as it moves upwards, how long will it take to reach John again.

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