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( Rotation)
A rotation is a movement of an object in a circular motion. A two-dimensional object rotates around a center (or point) of rotation. A three-dimensional object rotates around a line called an axis. If the axis of rotation is within the body, the body is said to rotate upon itself, or spin—which implies relative speed and perhaps free-movement with angular momentum. A circular motion about an external point, e.g. the Earth about the Sun, is called an orbit or more properly an orbital revolution. All rigid body movements are rotations, translations, or combinations of the two. A Rotation is simply a progressive radial orientation to a common point. That common point lay within the axis of that motion. The axis is 90 degrees perpendicular to the plane of the motion. If a rotation around a point or axis is followed by a second rotation around the same point/axis, a third rotation results. The reverse (inverse) of a rotation is also a rotation. Thus, the rotations around a point/axis form a group. However, a rotation around a point or axis and a rotation around a different point/axis may result in something other than a rotation, e.g. a translation.
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Rotation Subcategories
Rotation Articles
The Carb Rotation Diet Overview by Mirko van Anken
Carb Rotation Diet is a actually a good weight loss program that allows you to lose weight in a newer, more innovative way.This book was written by Jason Hunter. The book is splitted in man and woman area so you can get the plan for your gender. The ...
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