# Bio C. 6

 ______ 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 right-hand thumb rule to clarify direction of angular motion (clockwise/counterclockwise). Negative - ________ Positive - ________ CounterclockwiseClockwise 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 velocity2 / radius OR angular velocity2 X radius Centripetal Acceleration Anatomical Planes: 1. ______ 2. ______ 3. ______ 1. Sagittal Plane2. Frontal Plane3. Transverse Plane ______ plane divides the body into right and left. Axis of motion is ______. Sagittal PlaneTransverse (also called horizontal) ______ plane divides the body into upper and lower. Axis is ______. Transverse Longitudinal ______ plane divides body into front and back. Axis is ______. Frontal Anteroposterior 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 anterior-posterior axes (in frontal plane) • Adduction -- Abduction • Ulnar -- Radial Deviation • Inversion -- Eversion• Side-bending 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 Authorbbiggs ID8641 Card SetBio C. 6 DescriptionBio Updated2010-03-01T18:54:19Z Show Answers