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______ is the description of angular motion.
Angular Kinematics

The intersection of two lines, two planes, or a line and a plane.
Angle

Orientation of a line with another.
Types: Absolute and Relative
Angular Position

One line is fixed relative to the earth.
Reference point is FIXED.
Absolute Angular Position

Both lines capable of moving.
Relative Angular Position

The angle formed between initial and final position of the rotating line.
Angular Displacement

Use righthand thumb rule to clarify direction of angular motion (clockwise/counterclockwise).
Negative  ________
Positive  ________
 Counterclockwise
 Clockwise

Rate of change of angular displacement.
Angular Velocity

Rate of change in angular velocity.
Angular Acceleration

______ occurs when:
• Something spins faster and faster
• Slower and slower
• When the spinning object's axis of spin changes direction
Angular Acceleration

• The component of linear acceleration tangent to the circular path of a point on a rotating object.
• Is equal angular acceleration of the object times the radius.
Tangential Acceleration

• Linear acceleration directed toward the axis of rotation
• Directly proportional to the square of the tangential linear velocity and the square angular velocity
• If angular velocity is constant, centripetal acceleration is directly proportional to the radius of rotation
• If tangential linear velocity is constant, centripetal acceleration is inversely proportional to the radius of rotation
Centripetal Acceleration

_______ =
tangential velocity^{2 }/ radius
OR
angular velocity^{2 }X radius ^{}
Centripetal Acceleration

Anatomical Planes:
1. ______
2. ______
3. ______
 1. Sagittal Plane
 2. Frontal Plane
 3. Transverse Plane

______ plane divides the body into right and left.
Axis of motion is ______.
 Sagittal Plane
 Transverse (also called horizontal)

______ plane divides the body into upper and lower.
Axis is ______.

______ plane divides body into front and back.
Axis is ______.

Human movement normally described by relative movement between two limbs/parts of limbs (relative angular motion).
Joint Actions

Movements around the transverse axes (in sagittal plane).
 • Flexion
 • Extension
 • Hyperextension
 • Dorsiflexion/Plantar Flexion

Movements around anteriorposterior axes (in frontal plane)
 • Adduction  Abduction
 • Ulnar  Radial Deviation
 • Inversion  Eversion
 • Sidebending or Lateral Flexion
 • Elevation  Depression

Movements around longitudinal axes (in transverse plane)
 • Internal  External Rotation
 • Supination  Pronation
 • Rotation Right/Left

Movements in Multiple Axes:
• ______  combination of three plane movement at the same time.
• ______  hip of shoulder must first flex and then abd/add occurs.
 • Circumduction
 • Horizontal Abduction/Adduction

