List two different wheel and axles in which the force is applied to the axle. From your observation, estimate which of the two has the greater mechanical advantage.
a) Bicycle, doorknob; Bicycle has greater MA.
b) Windmill, screwdriver; Windmill has greater MA.
c) Fan, waterwheel; Waterwheel has greater MA.
d) Car tire, faucet; Car tire has greater MA.