(adsbygoogle = window.adsbygoogle || []).push({}); Projectile motion of conservation of energy?????

I have a problem that is stumping me. A guy throws a ball and wants it to go through a hoop 20 meters away and the hoop is 2 meters taller than from where he released the ball. If the only given info is the angle at which he threw the ball (45 degrees) How do I set up this problem to determine the initial speed at which the ball was thrown to make it go through the hoop. I have no idea how to set it up.

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# Homework Help: Projectile motion of conservation of energy?

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