Hi again. So, my teacher has requested that we do an explaination of how this chain works and to some how improve the method. http://home.comcast.net/~p.jectz/bike.jpg [Broken] There's the basic idea with the force acting downwards and the teeth of the chain pulling. So we could find torque to find rotational work, but would I split the circle into radians? Also, by improving it, when I graph it it's like a sin/cos graph and fluctuates up and down and what my teacher wants is how to decrease that. I know it sounds unclear but I am seriously confused myself. Any guidiance appreciated!