Sat June 16, 2012 By:

If the angular momentum of a body is found to be zero about a point,is it necessary that it will also be zero about a different point?

Expert Reply
Sat June 16, 2012
The angular momentum is expressed as:
L= r x P
Here L, r and p are angular momentum, distance and linear momentum vectors
from this formula it is clear that L can be 0 in following ways:
1. p or r is 0
2. these two vectors point are parallel or anti parallel, i.e angle between them is  0 or 180.
Thus it is not at wll necessary that angular momentum is 0 everywhere, it can definately give a finite value.
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