# Homework Help: Getting the average velocity from a parabolic curve

1. Sep 18, 2008

### theLHC

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

A ball accelerates steadily down a ramp, starting from rest. It goes 2m in 4s.
What is the average velocity?

3. The attempt at a solution
Well, i didnt attempt it because i didnt get it
i am thinking there is a typo and it is actually asking for the average acceleration, which i know how to do

here it is:

v1=0m/s
v2=x
d=2m
a=0.5m/s2
t=4s

so here is what i have

Aav= (P2-P1)/(t)
= (0-x)/(4)

now, i cannot go any furthur...

Last edited: Sep 18, 2008
2. Sep 18, 2008

### Dick

It's asking for average velocity. Average velocity is total displacement over total time. It's not that hard.

3. Sep 18, 2008

### theLHC

i know that but the graph has a parabolic curve
so how do you derive the average velocity of a moving object from a parabolic curve?

4. Sep 18, 2008

### Dick

Look up the definition of average velocity. Does the shape of the curve matter?

5. Sep 18, 2008

### theLHC

nvm
i was mistaken
sorry 4 the problem
:P