B2-31
Demonstrate equilibrium of torques

Two wheel and axle assemblies are provided. For each, there are cylinders of smaller radius r and larger radius R. A smaller weight m is suspended from a string wrapped around the larger radius R, and a larger weight M suspended from the smaller radius r. For equilibrium of torques:

mR = Mr.

On this model, radius ratios of 2:1 and 4:1 are available. A set of additional masses can be provided to vary the load.
FS2