Midterm 2 Flashcards
Centre of Pressure (COP)
The point on a plane surface at which the resultant pressure on the surface may be taken to act
Force
a mechanical interaction between an object and its surroundings, usually measured in Newtons
Force Platform
A n instrument used to measure the reaction forces in three dimensions (X,Y,&Z) and the moments about those three axes
Impulse
the area under a force-time curve (Ns), which corresponds to the force-time integral
Kinetics
the description of motion of a body in terms of the forces that cause the motion
Magnitude
size or amplitude
Vector
a quantity that conveys both magnitude and direction
Kinematics
descriptions of motion of a body in terms of displacement, velocity, and acceleration, without reference to the forces causing the motion
Sagittal Plane
a plane dividing the human body into left and right halves
Transverse Plane
a horizontal plane dividing the body into top and bottom halves
Frontal (or coronal) Plane
a plane dividing the body into anterior and posterior portions
Motion Capture Guidelines
- position single cameras for 2-D trials perpendicular to the plane of motion
- position cameras such that the points to be digitized are not obscured
- maximized image size
- illuminate the subject to ensure there is a good contrast between subject and background
- Control object/scaling rod
- etc.
Dynamic Analysis
utilizing free body diagrams to analyze force and moments occurring within the body during motion
Free body diagram
a graphic-analysis technique that defines a system and indicates how the system interacts with its surroundings
Force
mechanical interaction between an object and its surroundings
