Answer to Question #309385 in Physics for ake342s

Question

A car approaches a stop sign going 5 m/s before it comes to a stop. If it does this in 4 seconds, what was its acceleration?

Answer 1

The acceleration of the car

$$a=\frac{\Delta v}{\Delta t}$$

$$a=\rm\frac{0\: m/s-5\: m/s}{4\: s}=-1.25\: m/s^2$$