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

A football player throws a football at 40 degrees. A stationary player 31.5m downfield is ready to catch the ball. At what velocity does the player have to throw the ball in order to reach the downfield player?

We were told the correct answer is 17.7m/s

2. Relevant equations

I've been trying to use this equation:

Vy^2 = Voy^2 + 2ad

Voy=Vo*sin(theta)

3. The attempt at a solution

Since, Vy is equal to zero at the peak of the trajectory (15.75m)

So, 0=Voy^2 + 2*9.8m/s^2*15.75m

Solve for Voy and plug it into Voy=Vo*sin(40). Than solve for Vo.

But, I can not seem to get 17.7m/s.

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# Homework Help: Projectile Motion - 2D

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