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Unformatted text preview: momenta will not change with time: put dierently, their center of mass will move with constant velocity. A second conservation law is conservation of angular momentum , which says that in addition the (vector) sum of the angular momenta about the center of mass will be constant. This net angular momentum speciFes an axis (through the center of mass) and a rotation about that axis. or a rigid body, the motion can be decomposed into these two parts: the displacement motion of its center of mass, and its rotation about this axis through the (moving) center of mass. Exercises for 1.7 Practice problems: 1. ind an equation for the plane P described in each case: (a) P goes through (1 , 2 , 3) and contains lines parallel to each of the vectors v = (3 , 1 , 2) and w = (1 , , 2) ....
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 Fall '08
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 Calculus, Vectors

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