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ESS 303 – Biomechanics

ESS 303 – Biomechanics. Levers and Joints. Lever Components. Lever Fulcrum Effort Resistance MAE: Moment Arm of Effort MAR: Moment Arm of Resistance Three types of levers. MAE. MAR. Levers (Type I). E. R. F. MAR. MAE. Levers (Type II). E. R. F. MAE. MAR. Levers (Type III).

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ESS 303 – Biomechanics

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  1. ESS 303 – Biomechanics Levers and Joints

  2. Lever Components • Lever • Fulcrum • Effort • Resistance • MAE: Moment Arm of Effort • MAR: Moment Arm of Resistance • Three types of levers

  3. MAE MAR Levers (Type I) E R F

  4. MAR MAE Levers (Type II) E R F

  5. MAE MAR Levers (Type III) R E F

  6. Equilibrium of a Lever Formula • E * MAE = R * MAR • Question: Two children are sitting on opposite sided of a balanced sea-saw. One child’s body mass is 50 Kilograms and he/she is seated 1.5 meters from the fulcrum. How far from the fulcrum is the other child if his/her body mass is 40 Kilograms? • Answer: 50 Kg * 1.5 M = 40 Kg * X M • X = 1.875 Meters

  7. Articulations • Synarthrodial (Sutures of skull) • Amphiarthrodial (Between vertebrae) • Diarthrodial (Common)

  8. Joints • Articulations • Connection point between two bones • Six basic types of joints in the body

  9. #1 – Hinge

  10. #2 – Gliding or Plane

  11. #3 – Condyloid

  12. #4 – Pivot

  13. #5 – Ball & Socket

  14. #6 – Saddle

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