# Deceleration rate

1. Jun 9, 2008

### Timpo

I apologize for my ignorance, I'm an extreme newbie in physics.
Is it possible to determine the deceleration rate of a car only with following information?

initial velocity = 60mph (96km/h)
final velocity = 0mph (0km/h)
distance = 146ft (44.5m)

if so, how many distance would it take to stop from 60km/h (37.5mph)?

Thank you

2. Jun 9, 2008

### rock.freak667

$$v^2=u^2+2as$$

v=Final velocity
u=initial velocity
a=acceleration
s=displacement.

3. Jun 10, 2008

### James3849

do a search for newton's laws of motion. they are probably the most well known equations for scientists and engineers and worth remembering. there are a few other derivations than the one that rock freak has given you.

4. Jun 11, 2008

### Timpo

thanks a lot guys!!!