How does a Rubber Band Car Work?

A rubber band is attached to any fixed surface of the car and then the other end is attached to the rear axle of the car. You wind the car up by turning the back tires but be sure and keep the tires from free spinning until you are ready for the car to go. When you let it go, the rubber band that has been stretched will unwind from the axle and force the cars tires to turn thus pushing the car forward.