Hello again,(adsbygoogle = window.adsbygoogle || []).push({});

I'm having some issues with two of my problems. But I'll do one at a time and keep them here without having to start mulitple threads clogging the forum.

Here's my first problem: A soccer player kicks the ball toward a goal that is 28.0m in front of him. The ball leaves his foot at a speed of 19.1m/s and an angle of 33.8 degrees above the ground. Find the speed of the ball when the goalie catches it in front of the net. (Note: The answer is NOT 19.1 m/s.)

So here is my reasoning and what I have done. I assumed that if I found the accleration of the ball in the x direction and then pluged that answer back into a velocity equation, I would have the answer. But of course, I do not.

I also found Voy and Vox. I found Voy using: Voy = Vo sin theta and then Vox = Vo cos theta. From there I thought I would need to find the time the ball was in the air for the y axis, but now I'm thinking perhaps I should have found how long the ball was in the air along the x axis. But if that were the case I wouldn't know what the acceleration was.

In any case from everything I've done, I don't have the correct answer. Am I making this harder than it really is? I have a terrible problem with that. Was I at least even headed in the right direction? Thanks for any help provided.

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# Homework Help: Some Issues with Projectile Motion

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