Main Question or Discussion Point
For a science competition I have to construct a self-propelled car that doesn't use gas or electricity. It must accelerate horizontally and then go off a an incline and land 1 meter away from the end of the incline. I was completely prepared and I used a gear mechanism which worked beautifully but my Physics teacher told me that my design wasn't allowed. So yesterday I designed a car made of K'nex that that has a basic body and then two axles. One on the front and one on the back. There is a support beam in the middle and I clamped a hook onto it. I then clamped a hook onto the back axle and connected an elastic between them. I then wind the wheels and release them. My problem is I don't get enough speed. I have reduced the weight and put more elastics on but it can't even go off the ramp. I'm in serious trouble and I need a solution quickly!