Objectives:

• Define:
  • Relative and absolute angular position
  • Angular displacement
  • Average angular velocity
  • Instantaneous angular velocity
  • Average angular acceleration
  • Instantaneous angular acceleration
• Name units of measurement for above definitions
• Explain the relationship between angular and linear motion
• Define:
  • Tangential acceleration and explain its relationship to angular acceleration
  • Centripetal acceleration and explain its relationship to angular velocity and tangential velocity
• Describe anatomical position
• Describe the three principal anatomical planes and axes
• Describe the joint actions that occur at each of the major joints

Linear and Angular Quantities

Degrees and Radians
180 degrees = 3.14 radians

                           ANGULAR DISPLACEMENT
AVE ANGULAR VELOCITY = ---------------------------
                             CHANGE IN TIME

                            CHANGE OF ANGULAR VELOCITY
AVE ANGULAR ACCELERATION = ---------------------------
                                  CHANGE IN TIME

• Slope of angular position versus time equals angular velocity
  Running Example
  
  
• Connection of Linear and Angular Velocity: Golf example

  V = w * r
  Discuss how weight and length of golf clubs relates to the distance the club should hit.

• Tangential Acceleration: The component of of linear acceleration tangent to the circular path of a point on a rotating object

  a_T = a * r

• Centripetal Acceleration: The linear acceleration directed toward the axis of rotation

  a_r = w ² r

Muscles for this class

Anatomical Position

Spatial and Directional Terminology (check book pages 160-168 for images)
Anterior/Posterior
Superior/Inferior
Medial/Lateral
Proximal/Distal

Frontal Plane
Sagittal Plane
Transverse Plane

Longitudinal Axis
Anteroposterior Axis
Transverse Axis

Joint Actions (iclicker)
Flexion, extension, hyperextension, dorsiflexion, and plantar flexion
Flexion, extension, hyperextension, dorsiflexion, and plantar flexion (with answers)

Adduction, abduction, radial deviation, ulnar deviation, eversion, inversion, and lateral flexion
Adduction, abduction, radial deviation, ulnar deviation, eversion, inversion, and lateral flexion (with answers)

Rotation, horizontal abduction and adduction, supination, and pronation
Rotation, horizontal abduction and adduction, supination, and pronation (with answers)

In class questions: Practice recognizing motions
Baseball pitch
Layback
Soccer kick
Dive

In small groups choose activity and joint to describe motion