What is the mechanical advantage if the radius of the wheel is 49 cm and the radius of the axle is 7 cm?
MA = Radius of Wheel / Radius of the Axle
a. 3
b. 7
c. 21
d. 16
MA = Radius of Wheel / Radius of the Axle = 49 cm / 7 cm = 7
Therefore, the mechanical advantage is 7.
The correct answer is b. 7.