Biomechanics

Motion
1. Linear Motion
  1. Motion along a line
  2. Movement of Javelin
  3. Can be a curved line
  4. Skeleton Bob
2. Angular Motion
  1. Movement around a fixed point or axis
  2. Turning of a wheel
  3. Turning of the arm during an overarm cricket bow
3. General Motion
  1. A combination of Linear & Angular motion
  2. A wheelchair athlete. Chair & body = Linear. Wheels and arms = Angular
  3. Javelin Thrower. Body & javelin = Linear. Arms & Legs = Angular
Force
1. Functions
  1. Cause a body at rest to move
  2. Cause a moving body to change direction, accelerate or decelerate
  3. Change an object's shape
Centre of Mass
1. The point at which the body is balanced in all directions
Newton's Laws of Motion
1. 'Law of Acceleration'
  1. The rate of change of momentum of the ball, is determined by how much power is applied
  2. When a force acts upon an object, the rate of change of acceleration is proportional to the size of the force.
2. 'Law of Inertia'
  1. In a penalty kick, the ball remains stationary unless acted on by the player (external force).
  2. 'A body continues in a state of rest or uniform velocity unless and acted upon by an external force
3. 'Law of Motion'
  1. When the ball hits the bar (action), there is an equal & opposite reaction force (rebounding the ball)
  2. 'For every action, there is an equal & opposite reaction'
Stability
1. Factors affecting Stability
  1. Position of athlete's line of gravity
  2. Position of athlete's line of gravity
  3. Size of athlete's area of support

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Biomechanics

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