- #1

Medgirl314

- 561

- 2

## Homework Statement

Starting from rest, a car accelerates for 8 seconds with a constat acceleration. During this time it travels 121 meters. Find its velocity at the end of the 8 seconds.

## Homework Equations

a=(2x)t^2

Vavg=(Vinital+Vfinal)/2

## The Attempt at a Solution

First, I found the average velocity by deviding 121 by 8 to get 15.125.

Second, (with instruction from my physics teacher), I found the acceleration.

a=(2x)*8^2

a=(2*121)/64

242/64=3.78

a=3.78 m/s

Then, knowing the acceleration, I found the final velocity.

Vavg=(0+Vfinal)/2

15.125=(Vfinal)/2

15.125*2=30.25 m/s

So, Vfinal should be 30.25 m/s, correct? I'm fairly sure of my answer, but I like to check before I turn it in.

Thanks in advance for a reply!