# Homework Help: Uniform Acceleration-Algebraically

1. Sep 30, 2011

### alit00

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

An object was displaced 19.6 m east while uniformly accelerating from rest. If the average velocity of the object was 5.00 m/s east, what was the rate of acceleration?

2. Relevant equations

3. The attempt at a solution

So my Vo=0
Vf= 5.00m/s east
x=19.6m

I need to calculate acceleration. Which equation do I use and how would I manipulate it?
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Sep 30, 2011

### Staff: Mentor

What is the definition of average velocity? Can you extract a time from this definition and the given information?

If you know the time and the distance traveled, do you know of a kinematic equation that relates them to the acceleration?

3. Sep 30, 2011

### alit00

I don't believe I can extract a time from the problem. I tried using Vf^2 = V0^2 + 2ax. I do not know how to isolate the a. Can you help? My average velocity is my final velocity in this problem, is that correct?

4. Sep 30, 2011

### Staff: Mentor

You can extract a time. Go back to your notes and find the definition of average velocity.

5. Sep 30, 2011

### alit00

Average velocity is displacement/time. Would my time be 3.92s?

6. Sep 30, 2011

### Staff: Mentor

You have the average velocity and you have the displacement....

7. Sep 30, 2011

### alit00

I still do not understand. I tried every equation and am not getting the answer

8. Sep 30, 2011

### Staff: Mentor

Look at the definition for average velocity. Can you identify the time variable in the definition?
Isolate the time variable in the equation.