Angular Kinematics Terms Flashcards
Absolute angle
Angular orientation of a body segment with respect to fixed line of reference
Anatomical reference position
Reference point on the body in anatomical position
Angular acceleration
Change in angular velocity over change in time, alpha
Angular displacement
Change in position, theta
Angular distance
Total length of travel, phi
Angular speed
Change in angular distance over change in time, sigma
Angular velocity
Change in angular displacement over change in time, omega
Axis of rotation
Body revolving around a central line/point
Clockwise rotation
Negative numbers
Counterclockwise rotation
Positive numbers
External angle
Angle outside of two segments
General motion
Combo of angular/linear motion
Goniometer
Instrument that measures angles
Instant center
Location of joint center of rotation
Internal angle
Angle within two segments
Pitch
Rotate around mediolateral axis
Radial acceleration
Acceleration of a body in angular motion directed toward the center of curvature; change in direction, no change in speed
Radian
Unit of angular measure in angular-linear kinematic quantity conversions; 57.3 degrees
Radius of rotation
Distance from axis of rotation to point of interest on rotating body
Relative angle
Angle at a joint formed between longitudinal axes of adjacent segments
Right hand rule
Procedure for identifying the direction of an angular motion vector
Roll
Rotate about anteriorposterior axis
Tangential acceleration
Acceleration of a body in tangential motion directed along a tangent to the path of motion; change in speed
Total acceleration
Tangential AND radial acceleration
Yaw
To rotate around up/down vertical axis (longitude)
