Week 1 Flashcards
Define biomechanics
The application of mechanics to the human body
Define kinematics
Branch of mechanics that describes the motion of the body without regards to the forces or torques that may produce the motion
Kinetics definition
Branch of mechanics that describes the effects of forces and torques on the body
What are some methods of analysing biomechanics
Observation Anthropometry 3D motion capture Force plates/transducers Pressure sensors EMG-surface/fine wire
Biomechanics parameters that describe movement
Scalar
Vector quantities
Define scalar quantities
Represented by magnitude
E.g. Mass, time, length, speed
Define vector quantities
Represented by magnitude and direction
E.g force, moment, weight, velocity
What are degrees of freedom used to indicate
Planes of angular motion at a joint
Eg: flexion/ext
Int/ext rotation
Ab/adduction
Newton’s first law of motion
Every object in a state of rest or uniform motion will remain in that state unless an external force is applied to it
Newton’s second law of motion
The relationship between an object’s mass m, it’s acceleration a, and the applied force F is
F=ma
Newton’s third law of motion
For every action there is an equal and opposite reaction
Formula for torque
Torque = F x r (moment)
Pressure formula
Pressure = force/area
Work formula
Work= Force x Displacement
What unit is work calculated in
Joules (J=Nm)
