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Im haveinga problem setting up an equation.

1) A ball is thrown upward with initial velocity of 80 m/s.

a) how long is the ball in the air?

b) what is the greatest height reached by the ball?

c) when is the ball 20 m above the ground?

d)what is the velocity of the ball, when it hits the ground?

Im having problem setting up the equation in part d.

Thank You.

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# Homework Help: Velocity Problem

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