The document describes a radio control car traveling down a 10 meter straight track marked at 1 meter intervals. A judge started a stopwatch when the car passed the 2 meter mark, and stopped it when the car reached the 8 meter mark, recording a time of 3.9 seconds. Using the equation of motion that relates displacement, initial position, final position, time, and velocity, the speed of the car can be calculated to be 1.5 meters per second based on traveling 6 meters in 3.9 seconds.