Balance

Question 1

balance

Answer 1

The ability to neutralise force that disturbs equilibrium

Question 2

factors that affect balance

Answer 2

Size of base of support
§ The greater the base of support the more balanced you’ll be

Height of COG above the base of support

		§ The lower the height of COG the more balanced you'll be

Position of the line of gravity relative to the base of support
§ The closer it is to the base of support thew more balanced you’ll be

Mass of the object
The greater the mass the more balanced you’ll be

Question 3

segmental interaction

Answer 3

• Forces acting between the segments of a body can transfer energy between segments
  
  • These demands are usually centred around 2 factors
    ○ Power
    § More segments use and usually sequential
    ○ Accuracy
    Less segments used and usually simultaneous

Question 4

simultaneous contraction

Answer 4

• Where all body parts more that the same time to produce a force
  
  • Generally used for accuracy
    Golf putt

Question 5

sequential contraction

Answer 5

• Sequential combination of forces produced by different parts of the body acting together to maximise force
  
  • Generally used to produce maximal force
    Baseball pitch

Question 6

sequential combination of forces

Answer 6

○ The stronger and larger muscles of the thighs and trunk are moved first, followed by smaller and faster muscles
○ Sequentially accelerate each body part so optimum momentum passes from 1 body part to another
○ Each body part should be stable so that then et body part accelerates around a stable base to transfer momentum
○ Use as many body parts as possible to apply force over maximum possible time
○ Follow through is important to prevent deceleration
Ensure all forces are directed towards the target

Question 7

optimal projection

Answer 7

• The relationship between angle, velocity and height of release/landing height to atain the athletes goal
  
  • If the task is to maximise distance, the athlete must
    ○ Maximise velocity through biomechanical principles
    ○ Maximise height of release without sacrificing velocity of release or stability
    Angle of release with all other factors equal should be around 45 degrees optimally