- #1

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## Homework Statement

What distance is required to stop a car going 90km/h if the car can stop with an acceleration of -6.0m/s

^{2}?

## Homework Equations

a = v2-v1/t

d = (v1+v2/2)t

## The Attempt at a Solution

I'm thinking first we have to solve for t. Which would be the speed divided by acceleration, which is -0.36 km/h^2 over 80km/h which is 0.0045 hours.

Now to solve for distance, it would be 80km/2 x 0.0045

Which leaves me with 0.18 which is completely wrong because the answer is supposed to be 41 m.

Help please? Thank you.