Question

A bicycle has a front gear that is turned by a pedal and is connected by a chain to a

rear gear, which turns the rear wheel. If the pedal radius is 18.0 cm, the front gear
radius is 9.0 cm, the rear gear radius is 4.0 cm, and the rear wheel radius is 33.0
cm, what is the ideal mechanical advantage of the bicycle?
(A) 0.24
(B) 0.48
(C) 0.55
(D) 0.82

Answer 1

Pedal / Front Gear = 18 / 9 = 2

Front Gear /Rear Gear = 9 / 4 = 2 1/4

Rear Gear / Wheel = 4 / 33 = .121

2 * 2 1/4 * .121 = ,55

C) Seems true