Since the graph of the car's speed over time is not provided, we cannot definitively determine the car's speed at 17 seconds. Instead, we use general principles of physics: A car starting from rest with constant acceleration would increase in speed over time, while a car at constant speed would maintain its speed.
The provided graph is incomplete for determining the speed of the car at 17 seconds. However, based on the information given in the sample text snippets, we can infer that to determine the speed of a car over time, one would typically need either a velocity-time graph for the car or an applicable equation of motion.
If the car was starting from rest and had a constant acceleration, the speed after a given time could be calculated using the formula V = at, where V is final velocity, a is acceleration, and t is time.
If the car was traveling at a constant speed, the speed after any given time would remain the same. In the case of the question about the car reaching the checkpoint without friction and with constant acceleration, Car A would be traveling faster.