5.1 Biomechanical Principles Flashcards
What are Newton’s laws of linear motion
- Newton’s first law = law of inertia
- Newton’s second law = law of acceleration
- Newton’s third law = law of action/reaction
Newton’s first law (law of inertia)
Force required to change state of motion
Newton’s second law (law of acceleration)
Magnitude (size) + direction of force determines magnitude + direction of acceleration
Newton’s third law (law of action/reaction)
Action force = to reaction force
Definitions + equations + unit for speed
Defined as rate of change of position
Speed in m/s = distance in (m) / time in (s)
Definition, equation + unit of distance
Defined as length of the path a body follows when moving from one position to another.
Distance (m) = speed(m/s) x time (s)
Centre of mass + factors affecting
- point of concentration of mass or point of balance of a body
Factors affecting:
- height of centre of mass
- line of gravity
- area if the base of support
- mass of performer