Quantify the qualitative (clinicians and designers vs. engineers)
Scalars vs. Vectors, bad jokes
Force (mass, wine, and elevators)
Friction (without it, we can’t walk)
Torque (embarrassing doors)
Relative motion: reference earth, bike, sun?
The cause of motion is a force
Two type of motion:
- Translation (linear)
- Rectilinear
- Curvilinear
- Rotation (angular)
Degrees of Freedom (Etch-A-Sketch, Planes)
Anatomical Planes
Sagittal plane: flexion/extension
Coronal/Frontal plane: abduction/adduction
Transverse plane
How muscles (in theory) generate force that’s transformed into joint torque that creates movement.