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The Lever

B y Alex P erez Jeremiah M acIntire Ever Rodriguez. The Lever . Definition. A lever is a simple machine that makes work easier for use; it involves moving a load around a pivot using a force. Many of our basic tools use levers.

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The Lever

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  1. By Alex Perez Jeremiah MacIntire Ever Rodriguez The Lever

  2. Definition • A lever is a simple machine that makes work easier for use; it involves moving a load around a pivot using a force. Many of our basic tools use levers. • Levers are one of the basic tools that were probably used in prehistoric times. Levers were first described about 260 BC by the ancient Greek mathematician Archimedes

  3. First Class Lever • In a Type 1 Lever, the pivot (fulcrum) is between the effort and the load. In an off-center type one lever (like a pliers), the load is larger than the effort, but is moved through a smaller distance.

  4. Second Class Lever • A Type 2 Lever. In a Type 2 Lever, the load is between the pivot (fulcrum) and the effort.

  5. Third class lever • A Type 3 Lever. In a Type 3 Lever, the effort is between the pivot (fulcrum) and the load.

  6. Examples • First class lever • Second class lever • Third class lever

  7. Levers In The Human Body • The arm and legs are examples of third class levers

  8. Mechanical advantage of the lever • F1 X D1 = F2 X D2. • MA = length of effort arm ÷ length of resistance arm. • The longer the are the easier to left larger objects

  9. Sources • Dynamicscience.com • Enchantedlearning.com

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