Hey guys, I just started a physics class in college and I'm having a hard time understanding most of it, but I'm trying...(adsbygoogle = window.adsbygoogle || []).push({});

Anyways, I'm trying to find "Distance Up" for the problem below, and I just can't understand how the professor got 1.28m for his answer.

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

A projectile launched at an angle of 30 degrees, and a velocity of 10 m/s.

Find:

Horiz. Vel. (I got 8.66 m/s)

Vert. Vel. (I got 5 m/s)

Time Up (He gave us this, .51 sec)

Total Time (I got 1.02 sec)

Distance Up (Can't figure this out...)

Distance (I got 8.84 m)

2. Relevant equations

Distance Up = (Final Vel^2 - Initial Vel^2) / 2 * Acceleration

or = Initial Vel * Time + 1/2 * Acceleration * Time^2

3. The attempt at a solution

Well, I'm having a hard time figuring out how to get Final Velocity with this type of problem....

I mean, the initial velocity should 0, so when I plug that into the 2nd formula I get:

(0 * 1.02) + (1/2) * 9.8 * 1.02^2 = 5.09796

But the correct answer should be 1.28 m....

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# Homework Help: Finding Distance Up (Max Height) trouble

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