Non-Linear Lever Examples: Get the Answers Here

[shakdaddy]

Firstly, this is a great forum!

Maybe this is more of a mechanical engineering question, but ...

Can someone help give me some examples of non-linear levers? I want to be able to stretch a rubber band with factored-increasing force. Like a reversed camber on a compound bow.

I hope I asked this correctly. My physics vocabulary is limited- but improving with the help of this forum.

 

[Danger]

What you are dealing with is actually a cam rather than a lever. A quick Google should turn up lots of information about how to calculate the profile to fit your needs. I can't do math, so I always work mine out using cardboard or plastic pieces for mock-up trial and error design.