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Levers

Levers. Leverage is the use of a mechanical advantage to: Overcome resistance Create balance Exert force or power Increase speed Increase range of motion. E. R. F. Lever definition: a rigid bar that turns about an axis of rotation, or a fulcrum. E. R. F.

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Levers

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  1. Levers

  2. Leverage is the use of a mechanical advantage to: • Overcome resistance • Create balance • Exert force or power • Increase speed • Increase range of motion

  3. E R F Lever definition: a rigid bar that turns about an axis of rotation, or a fulcrum.

  4. E R F All lever systems three components: • Fulcrum = axis • 2.Effort = force • 3.Resistance joint muscles the weight lifted + resistance of gravity

  5. 3 types of levers found in the human body 1st Class 2nd Class 3rd Class

  6. The arrangement or location of E F R in relation to one another determine the type of lever and for which kind of motion it is best suited. E F R

  7. E R F 1st class lever When the Fulcrum is placed between the Effort and the resistance Designed for balance http://www.usoe.k12.ut.us/curr/science/sciber00/8th/machines/sciber/lever1.htm#

  8. 1st class lever

  9. E F R 2ND Classlever When the resistance is between the fulcrum and the effort Designed for power http://www.usoe.k12.ut.us/curr/science/sciber00/8th/machines/sciber/lever2.htm

  10. 2ND Classlever

  11. E R F 3rd Classlever When the Effort is between the Fulcrum and the Resistance Designed for speed and range of motion http://www.usoe.k12.ut.us/curr/science/sciber00/8th/machines/sciber/lever3.htm

  12. 3rd Classlever

  13. Memory Clue – 1EFR (first-class, effort, fulcrum, resistance) Memory Clue – 2FRE (second class, fulcrum, resistance effort) Memory Clue – 3FER (third-class, Fulcrum, effort, resistance)

  14. What kind of lever is most prevalent in the body? Designed for speed and range of motion 3rd class

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