Basic Biomechanics Flashcards
What is the definition of basic biomechanics
The study of the movement of living things using the science of mechanisms
Define biomechanics
Mechanical principles applied to the body
What are the two fundamentals of biomechanics
Derived quantities
Basic quantities
Name the derived quantities
Velocity (ms-1)
Acceleration (ms-2)
Force (N)
Density (kg/m3)
How do you calculate velocity
Displacement/ time
How do you calculate acceleration
Velocity/ time
Name the basic quantities
Length (m)
Time (s)
Mass (kg)
How do you calculate force
Mass x acceleration
How do you calculate density
Mass/ volume
Forces are governed by 3 laws, what are they?
1) law of inertia
2) law of motion
3) law of action, reaction
What is the law of inertia
States that every object will remain at rest or in uniform until a force is applied on it.
What is the law of motion
States that an objects force is proportional to the acceleration
What is the third law, “action, reaction”
Every action has an equal and opposite reaction
What is torques
Amount of force around a central axis, fulcrum or pivot
What is the lever arm
The perpendicular distance between the force and the fulcrum
The site of muscle attachment can have an impact on what?
Force and velocity outputs
If inserted close to the site of rotation then the muscle favours what
Speed
If the muscle is inserted further away from the site of rotation then it favours…
Strength
Vertebrate mass is concentrated around what
Central point
The central point is moveable depending on what..
Mechanical situation
What is friction drag reduced by
Smooth surface
What is pressure drag reduced by
Streamlining
Water and air are …
Both fluids but different viscosity
What is “drag”
When forces are acting in opposite directions
