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ASVAB · Simple Machines (Levers, Pulleys, Gears)

A wheel-and-axle system has a wheel radius of 12 inches and an axle radius of 3 inches. What is the mechanical advantage?

Correct answer

4

  1. A 2
  2. B 3
  3. C 4
  4. D 36

Why this is the answer

MA (wheel and axle) = wheel radius ÷ axle radius = 12 ÷ 3 = 4.
Source: ASVAB MC, Wheel and Axle

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