These graphs also show if the object is moving at a constant speed or accelerating, decelerating, or still. What is shown on the velocity-time graph? Acceleration is shown by a straight rising line.

A negative gradient shows the rate of “slowing down” or deceleration. Velocity-time graphs show velocity on the vertical axis. Acceleration is still represented by the gradient. Key fact The ...

For those of you remaining, I am going to show you another way to find the acceleration from this distance-time data. Let's go back to our kinematic equation (assuming we start with zero velocity).

Since the graph is velocity vs. time, the change in velocity divided by the change in time is the same thing as the slope of this line. But wait. The data doesn't show a straight line.

Select a car from the bunch, click "Hit the Brakes" to slow it down and watch the traffic wave form. The red bars show deceleration levels (braking) and the green, acceleration (speeding up). Mouse ...