More Biomechanical Terms

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    More Biomechanical Terms - Presentation Transcript

    1. More Biomechanical Terms
    2. Inertia
      • Inertia is the term used to describe a body's resistance to a change in its state of motion
      • Think of it as an objects resistance to beginning movement
      • The heavier the object, the greater its inertia and therefore the greater the force required to move it or change its state of motion
    3. Activity 1
      • In pairs, chest-pass the basketball and medicine ball over three distances (1m. 3m, 5m)
      • Which ball has the greater inertia?
      • Which ball is easier to throw over longer distances? Why?
      • Note which ball is more difficult to catch or stop (this will be referred to again when discussing momentum)
    4. Activity 2
      • Write down 5 sporting examples of Inertia
      • A stationary soccer ball resting on the pitch
    5. Momentum
      • The momentum of an object is equal to its mass or weight X by its velocity
      • Momentum – Mass X Velocity
      • Therefore, an object can only have momentum if it is moving. The greater its momentum, the further it may travel and the harder it is to stop or slow the object
    6. Activity 3 In the above picture, let's say that the mass is 2.0 kg and that the velocity is 4.0 m/s. That is: m = 2.0 kg v = 4.0 m/s Using the formula work out the objects momentum and express it in kg-m/s
    7. Some More
      • m = 4.36kg
      • V = 15 m/s
      • =
      • M= 15.47kg
      • V = 35m/s
      • =
    8. Activity 4
      • Explain why the principal of momentum is important in sports and sports competition
    9. Impulse
      • The concept of impulse is best described by the following formula
        • Impulse= Force X Time
      • In this equation force equals the objects mass X by its acceleration and time equals the length of time for which the force is applied to the object
      • The longer a force can be applied and the greater the force applied, the greater the objects impulse
    10. Types of Motion
    11. 3 basic forms of Motion
      • Linear
      • Angular
      • General
    12. Linear Motion
      • Linear : ALL parts of the body move through the same distance, in the same direction, in the same time
      • List 3 other examples of Linear Motion
    13. Angular Motion
      • Angular (rotation): The body moves in a circular path around an axis of rotation so ALL parts of the body move through the same angle , in the same direction , in the same time
      • List 3 Examples of Angular Motion
    14. General Motion
      • General : Combination of linear and angular, and is the most common in human movement
    15. Sport/Activity Linear Angular General 100m sprint Tobogganing down a hill Teeing off at golf The shoulder in a cricket bowling action Cycling Going down a slide An ice skater spinning

    + mrrobbomrrobbo, 8 months ago

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