Chapter 10, Problem 4AC

Aaron a bicycle mechanic, is studying the mechanical advantage of the rear wheel The rear wheel’s radius is 14.0 in and the chain is currently on a gear with radius 1.65 in. (Fig. 10.3 ). (a) If the chain applies a force of 54.5 lb on the wheel, what is the mechanical advantage of the wheel? (b) What is the resistance force? (c) Haw many inches of chain must be used to turn the wheel one complete rotation? (d) Finally, under what circumstances is it beneficial for a bicycle to have a mechanical advantage less than 1.0?

Figure 10.31