Lectures on Physics has been derived from Benjamin Crowell's Light and Matter series of free introductory textbooks on physics. See the editorial for more information.... 
Home Conservation Laws Conservation of Angular Momentum Restriction to rotation in a plane  
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Restriction to rotation in a planeIs angular momentum a vector, or a scalar? It does have a direction in space, but it's a direction of rotation, not a straightline direction like the directions of vectors such as velocity or force. It turns out that there is a way of defining angular momentum as a vector, but in this book the examples will be confined to a single plane of rotation, i.e., effectively twodimensional situations. In this special case, we can choose to visualize the plane of rotation from one side or the other, and to define clockwise and counterclockwise rotation as having opposite signs of angular momentum. Discussion Question


Home Conservation Laws Conservation of Angular Momentum Restriction to rotation in a plane 