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MIT 8.01 Physics I Classical Mechanics, Fall 1999 8 Online
OpenStudy (anonymous):

Why is momentum in frame of reference of centre of mass zero?Can somebody explain me with formula? Thanks.

OpenStudy (vincent-lyon.fr):

Simply because in the definition, it is stated that the centre of mass of the system must be fixed in this frame of reference. As total momentum = total mass x velocity of centre of mass, then momentum of the system is zero.

OpenStudy (anonymous):

Thanks.

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