How can I double the distance of a pulled object using a scissor system?

[Lex1138]

I'm working on a project for school and I have to come up with a system where a pulled object moves twice as far as the object doing the pulling. I think I've seen a pulley system that can do this, but I can't remember where. If anyone has any suggestions, I would greatly appreciate it.

 

[TVP45]

Have you searched on "block and tackle"?

 

[berkeman]

Welcome to the PF, Lex1138

http://en.wikipedia.org/wiki/Pulley

 

[Lex1138]

Thanks for your replys, I think I'm going to go with a scissor system. I think that may work best in my project.