Finding distance based off acceleration

1. Oct 6, 2007

JDR 007

[SOLVED] finding distance based off acceleration

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

A car slows down uniformly from a speed of 26.0 m/s to rest in 4.50 s. How far did it travel in that time?

2. Relevant equations
Acceleration (you all know it)

3. The attempt at a solution
I am totally stuck all I can do is find acceleration ...-5.78m/s^2

2. Oct 6, 2007

learningphysics

What kinematics formulas do you know for uniform acceleration? displacement formulas...

3. Oct 6, 2007

Kurdt

Staff Emeritus
Last edited: Oct 6, 2007
4. Oct 6, 2007

JDR 007

$$x = x_0 + v_0 t + (1/2) a t^2$$ Should I try using this?

5. Oct 6, 2007

learningphysics

you can do that since you've calculated acceleration.

you can also use $$d = \frac{(v1 + v2)}{2}*t$$

which also gives you the answer.

6. Oct 6, 2007

JDR 007

45.495m is that right?

7. Oct 6, 2007

learningphysics

No. how did you get that?

8. Oct 6, 2007

JDR 007

I accidentally pluged accel. in for velocity

9. Oct 6, 2007

JDR 007

so.. 26*4.5-1/2(-5.78) what am I missing

10. Oct 6, 2007

JDR 007

58.5?....v1 26m/s v2 0m/s t=4.5

11. Oct 6, 2007

Kurdt

Staff Emeritus
You should add on the acceleraton term and multiply it by the time squared.

12. Oct 6, 2007

Kurdt

Staff Emeritus
That is correct.

13. Oct 6, 2007

JDR 007

I totally was making that harder than it was, I would like to thank you for your help