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Biomechanics (Motion (Directions (Linear: motion in a straight line,…
Biomechanics
Motion
Velocity: is the displacement of an object over time and includes direction
velocity (m/s) = displacement (m) / time (s)
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Speed: is the distance covered by the athlete in a specified time
speed (m/s) = distance (m) / time (s)
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Balance and Stability
Stability: Your body's ability to return to a desired position or trajectory following a disturbance to equilibrium
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Base of support: Surface area within point of contact. If the line of gravity falls within base of support they are balanced
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Fluid Mechanics
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Flotation: when a body attempts to float a weight of water will be displaced
- if this volume of water displaces is heavier than the body displacing it, it will float
-if this volume of displaced water is lighter than the body displacing it, it will sink
Archimedes Principle: the fact that the upward buoyant force that is exerted on a body immersed in water is equal to the weight of fluid that the body has displaced
Centre of buoyancy: centre point of the mass below the water and is the point though which the buoyant force acts
Fluid Resistance: forces that impart resistance that impacts on the efficiency of this movement (drag)
Drag: oppositional force that impedes the movement of an object through fluid. The more streamlined an object the less drag forces
Reduce drag: equipment and clothing, technique, surface materials