Biomechanics

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  • BiomechanicalPrinciples
    • Newton's Law Of Motion
      • Newton's Second Law Of Motion- Law Of Acceleration
        • "A body's rate of change in momentum is proportional to the size of the force applied and acts in the same direction as the force applied."
      • Newton's First Law Of Motion- Law Of Inertia
        • "A body continues in a state of rest or uniform velocity unless acted upon by an external or unbalanced force."
      • Newton's Third Law Of Motion- Law Of Reaction
        • "For every action force applied to a body there is an equal and opposite reaction force."
    • Calculations
      • Acceleration
        • Acceleration = (Final Velocity - Initial Velocity) / Time Taken
      • Momentum
        • Momentum = Mass x Velocity
      • Force
        • Force = Mass x Acceleration
      • Velocity
        • Velocity = Displacement / Time Taken
    • Force
      • Net Force: the sum of all forces acting on a body.
      • Effects of Force
        • Decelerate a Body
        • Accelerate a Body
        • Change Direction Of A Body
        • Create Motion
        • Change Shape Of A Body
      • Vertical Forces
        • Weight
        • Reaction
      • Horizontal Forces
        • Air Resistance
          • Factors affecting AR: velocity, shape, frontal cross-sectional area, smoothness of surface
        • Friction
          • Factors affecting friction: Roughness ground surface, roughness contact surface, temperature, size of normal reaction
      • Balanced Force
        • NET = 0 , Weight=Reaction , Air Resistance=Force
      • Unbalanced Force
        • NET is greater than 0
    • Analysis through the use of technology
      • Limb Kinetics
        • 3D, converts motion , uses optical motion analysis, for joint/limb efficiency
        • Highly accurate, improve performance, prep/excecution/follow through can be evaluated
        • Highly specialised, not for individual differences, accuracy depends on marker placement
      • Wind Tunnels
        • Develop drag reduction, decrease AR, aerodynamic efficiency, tight control environmental variables
        • specialised facillities, expensive, complex analysis done by proffessional
        • Precise, accurate, reliable results, time efficient
      • Force Plates
        • Gait analysis, force tranduces, electrical output appears graphically, 3 planes of motion
        • specialist, expensive, laboratory conditions, may change way athlete jump/run
        • Immediate, accurate, reliable resultsImmediate, accurate, reliable results

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