1. The problem statement, all variables and given/known data Let's say you are given 10 identical springs. How would you develop a scale of force (i.e., a means of producing repeatable forces of variety of sizes) using these springs? 2. Relevant equations None that I can think of. 3. The attempt at a solution My guess is that I have to measure out the length of one spring, and then measure its force using a probe of some sort. However, I am not sure how to go about creating a scale of force.