# Homework Help: Finding maximum velocity

1. Oct 26, 2008

### tambob30

1. Information I have:

v=??
d=0.4 km
t=0.75 s
average acceleration= -.1 km/s2

2. Relevant equations

Need to find out what is the maximum speed that car will not reach displacement (acceleration doesn't change)

3. The attempt at a solution

final velocity= starting velocity + acceleration x time
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Oct 27, 2008

### nasu

For a PHYSICS problem the numbers are not the main thing.
If you don't explain what actually happens in the problem the numbers are meaningless.
It will help you too to try first to UNDERSTAND what is going on and then look at the numbers.
So don't dismiss the "story" in a problem, this is the main part...

Last edited: Oct 27, 2008
3. Oct 27, 2008

### christensen

Reading over this wiki-page might help clear up and misunderstandings you're having about your problem.

http://en.wikipedia.org/wiki/Equations_of_motion

*Remember to keep your negative signs, they are important.

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