Madi P & Mika B

What is a Pulley?

A circular lever that consists of a grooved wheel rotating about a hub

Examples Used In The Real World

  • Fish rod
  • Elevators
  • Flag poles
  • Bikes
  • Fishing boat
  • Belt and motors

The Mechanical Advantage

If it's just a single pulley system the work done is still the same as if with out it. But if it is a multi pulley system the work done decreases.

3 different formulas and ways!

  • AMA= Output Force/ Input Force
  • Counting ropes not including the rope you pull
  • IMA= Input Distance/ Output Distance


  • You're trying to lift a box that is 100N using a pulley with two support ropes. What is your MA?