Gravity is the main power source moving the car along the track. Gravity pulls on an object at a rate of 32 feet per second per second. Gravity moves the car on the slope of the track, and ceases to move the car on the flat of the track. These two forces are components of the car's gravity force vector. Friction is the main force acting against the car.
Friction is therefore the main cause of energy loss.
This process happens when the car's wheels roll on the rack, slide on the track, and rub against the guide rail. These are the main physical forces acting upon the Pinewood Derby car. Methods have been created in order to improve the Pinewood Derby car. Before the car races lubricants such as graphite can be applied to the car. One idea is to lubricate the wheels and axles by putting them in a bag with graphite a few days before the race.