How to calculate the work increase by using a lever of a given length.?

Question

I need to know the formula to be able to use different length levers to do different amounts of work.

Answer 1

Using a lever will not change the amount of work done.  If you're considering a frictionless system, the the work done on one side of the lever will equal the amount of work done on the other side of the lever.  The formula starts out like this: F*d+F*d=0

F is the force, and d is the distance that the force is applied over.  so if you rearrange it, the first Fd will equal negative of the second fd.  If you're talking about stick on a rock type of lever, then it goes like this (mass of load)(distance of load from fulcrum)=(force applied downward on other side of lever)(distance from fulcrum that the force is being applied)

Hope this helps!