Biomechanics 3 Flashcards
Define ‘Base of Support’
Area around outermost region of contact between a body, & a support surface.
Area beneath a person (includes every point of contact)
What are the factors that affect Balance & Stability
- Mass of the object
- Size of base support (BOS)
- Height of COG above the BOS
- Position of LOG relative to the base of support
- Increased BOS in direction of oncoming force
- Positioning COG near edge of BOS in direction of oncoming force
Explain the factor 1. Mass of the object
The larger the mass, the greater the stability will be (provided all factors are equal)
Explain the factor 2. Size of base support (BOS)
The larger the area of support, the greater the degree of stability
Explain the factor 3. Height of COG above the BOS
The LOG will always pass vertically through the COG of an objects mass
Low Centre of Gravity results in what
High Stability
High Centre of Gravity results in what
Low Stability
Explain factor 4. Position of LOG relative to the base of support
The close the LOG is to the limit of the base of support, the less the degree of stability of the object is
What are Low Balance Sports
- Sprint Sports
- Tennis
- Quick Lateral sports
What are High Balance Sports
- Wrestling
- Weightlifting
- Collision Sports
Unbalancing Quickly results in what
Fast movement time
Define Fulcrum/Axis
Point around which the lever rotates.
Define Effort/Force Arm
The distance between the fulcrum and the point at which the force is applied.
What is Resistance Arm
The distance between the fulcrum and the centre of resistance.
What is Input (Effort) Force
Force exerted ON the lever
