How is the angular speed of the rear wheel (w_R) of a bicycle related to that of the pedals and front sprocket (w_F) ? To show this relationship, I have to derive a formula for w_R/w_F. N_F and N_R are the number of teeth on the front and rear sprockets , respectively. The teeth are spaced equally on all sprockets so that the chain meshes properly. Please help me start up the problem. Thanks for any pointers.