1 / 14

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.

dennistodd
Download Presentation

Levers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  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

More Related