If the car has a constant acceleration ... a graph? Here is a velocity vs time graph for this same situation. As you can see from this plot, the distance traveled would be equivalent to the area ...

and acceleration = velocity change ÷ time. To find the distance travelled, look at the area under the graph. In the first 10 seconds this is the area of the triangle, ½ × 10 s × 40 m/s = 200 m.

Now I can use the video version of the same thing and Tracker Video analysis to get the following plot of horizontal position vs ... acceleration is defined as: The slope of the velocity-time ...