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1. The problem statement, all variables and given/known data

Nicole throws a ball straight up. Chad watches the ball from a window 5.0m above the point where Nicole released it. The ball passes Chad on the way up, and it has a speed of 10 m/s as it passes him on the way back down. How fast did Nicole throw the ball?

2. Relevant equations

Vf=Vi + at

y=Vi(t)+.5a(t)(^2)

Vf^2=Vi^2+2(a)(y)

3. The attempt at a solution

I've tried starting with the final V =0 and I've tried to solve the downward motion of the ball first, to attempt to get maybe the y value, or height of the ball at it's max. Please, where should I start? What am I missing?

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# Homework Help: How fast was the ball thrown?

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