It shows how the car accelerates rapidly, and then proceeds at a constant velocity. The Solar Sprint finish line is at 20 m from the start, so this car does not reach the finish line before the end of simulation. The second graph shows the velocity of the car and the applied motor voltage. The car can be seen to quickly reach a constant velocity. This is clearly shown by the third graph, which shows power delivered by the PV panel, and mechanical power delivered by the motor.
Power delivery increases rapidly to a peak, and then falls off just as quickly.
This gear ratio is clearly too low. Simulation with various gear ratios shows that the best time to the finish line for this particular car is obtained with a gear ratio of around 0.5. The following three graphs show the results of this configuration. The graph of displacement versus time shows a considerable improvement in time to the finish line, crossing it in about 6.2 seconds. The applied voltage and velocity graphs show a slower acceleration at the beginning because of the higher gear ratio, but continuing increase of velocity to a much higher value than was achieved with the lower gear ratio.