We have already seen the linear momentum and know
Linear momentum is a description of the linear motion of an object. Linear momentum is important because it is conserved. That is, in the absence of external forces, the total linear momentum of a system remains the same.
In a similar way, we will define angular momentum to describe the rotational or angular motion of an object. Like its linear counterpart, it is important because it is conserved. That is, in the absence of a net external rotational force, the angular momentum of a system remains constant.
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(C) 2003, Doug Davis; all rights reserved
