What is the best design for a physics car project? Such as what materials should be used and what should the body be built like? I'm struggling to come up with the best design as the car needs to travel 7m on a straight line (no ramp) and have a fast acceleration (no specific number just faster than the other cars other students created) and not include a motor (use of air, gravity, or tension to power). I am however looking for the best way to make my car travel far and fast and i'm open to creative ideas that will allow me to do well. Thank you