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Posted by Luis Hamburgh on September 24, 2001 03:16:26 UTC

Hello Mark,

I think you have chosen a very fitting screen name for yourself.

I understand what a vector is, insofar as it describes the 'from point a to point b' process as a whole (in the case of a linear vector). I understand that a vector is non-specific in its spatial manifestation; that is, I understand that a vector's location is no more a *per se* part of the vector itself than a plank of wood's location is a part of the plank itself (although this presumption could open an interesting philosophical thread).

But what I can't see, and need you to help me see, is how we can determine the momentum of a specific object without knowing the object's trajectory, and thereby the location of its vector.

Thanks,

-LH

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