Biomechanics
- Created by: Elise_parfitt
- Created on: 13-05-19 13:48
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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."
- Newton's Second Law Of Motion- Law Of Acceleration
- Calculations
- Acceleration
- Acceleration = (Final Velocity - Initial Velocity) / Time Taken
- Momentum
- Momentum = Mass x Velocity
- Force
- Force = Mass x Acceleration
- Velocity
- Velocity = Displacement / Time Taken
- Acceleration
- 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
- Air Resistance
- 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
- Limb Kinetics
- Newton's Law Of Motion
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