Biomechanics

  1. Law 1 - an object will remain at rest or in motion unless acted upon by an external force

  2. Law 2 - f = mxa

  3. Law 3 - every action has an equal and opposite reaction

 

 Load + Fulcrum + Effort → First, second, third class levers.

 

What is biomechanics:

  • Physics of human movement

 

 

Balance: maintain stability when stationary or moving

Factors: centre of gravity, line of gravity, base of support, mass of body

 

Base of support (BOS) - contact with the base of the surface

Centre of gravity (COG) - equally balanced, object is at centre of mass

Line of gravity (LOG) - theoretical line that is drawn from centre of gravity to the base of support
Mass of body - increase mass of body or object increases stability

 

Stability - resist being moved

Factors: dependent on the centre of mass being directly above base of support, increase in friction, increase in rotation, increase in mass, lean into an oncoming force

 

Force -

Factors:

 

Motion -

Factors:

 

Levers - for a lever to move a resistance force must be applied. A lever amplifies a small force  and turns  around a fixed point (axis).

Factors:Load