Key fact The gradient of speed-time and velocity-time graphs represent acceleration. The area under a speed-time graph represents the distance travelled.

Key fact The gradient of speed-time and velocity-time graphs represent acceleration. The area under a speed-time graph represents the distance travelled.

But ignoring that special lab, the best way to build or verify a model is with a graph. Let’s look at the constant velocity cart again. Say that the cart starts at time t = t 0 and position x = x 0.