- #1

Natko

- 44

- 0

## Homework Statement

A car is slowing down at a rate of 20 km/h/s. How far does it travel if its original velocity is 50 km/h and its final velocity is 5.0 m/s?

## Homework Equations

v

_{f}

^{2}= v

_{0}

^{2}+ 2aΔx

## The Attempt at a Solution

v

_{f}

^{2}= v

_{0}

^{2}+ 2aΔx

Δx = (v

_{f}

^{2}- v

_{0}

^{2}) / 2a

= (18

^{2}-50

^{2}) / 2(-20)

= -2176 / -40

= 54.4 m

That's wrong, though. The answer should be 15 m.