How Can I Build a High-Jumping Mechanical Jumper?

[neveax]

Hi,
I'm in gr. 11 physics, for a project, we have to build some kind of jumper. The "winner" is one that jumps the highest with the best weight/height ratio. Compressed gas, rockets and propellers cannot be used. Anything else is fine, like springs/elastics, I think magnets are allowed but I can't think of any way to make the whole system jump. It has to jump, not fly. I really can't think of any, and my idea is really complicated and I have no idea how I'm even going to guild it. Any ideas?

Thanks.

 

[member 553083]

One idea could be to use a large elastic band or bungee cord attached to the jumper at one end and another structure at the other end. When the elastic is released, it will pull the jumper up and cause it to jump. You could also build a catapult with a spring or elastic band that would launch the jumper into the air. You could also try building an inclined ramp with a roller at the end that the jumper would roll down and then leap off of. Finally, you could build a trampoline-like structure with springs or elastic bands for the jumper to jump on.