(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

This problem has really been bugging me, and i cant seem to figure it out. Heres the question:

Nicole throws a ball straight up. Chad watches the ball from a window 5.90 m above the point where Nicole released it. The ball passes Chad on the way up, and it has a speed of 15.0 m/s as it passes him on the way back down.

How fast did nicole throw the ball?

I dont understand how the guy in the window at 4.9m meters helps me at all. Any help will be greatly apprectiated. Thanks.

2. Relevant equations

V final = V initial + a(delta t)

3. The attempt at a solution

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# Homework Help: Need help with a Kinematics problem

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