Forms of Motion

Linear/Translatory Motion

Motion along a line. All parts of the ‘system of interest’ move in the same direction at the same speed (eg a skater’s arms and body maintain their angles of orientation during forward translation)

RECTILINEAR – Linear/Translational Motion along a STRAIGHT LINE

CURVILINEAR – Linear/Translational Motion along a CURVED LINE

Angular Motion

Rotation around a central imaginary line – the AXIS of ROTATION, which is PERPENDICULAR to the PLANE of ROTATION

General Motion

Translation and Rotation combined (most human movement involves this type of motion)

Mechanical System of Interest

An object or group of objects to be studied for analytical purposes, eg.:

-Entire human body

-Trail Arm

-Golf Ball

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