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Centre of mass of a two particle system

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In figure (a), two particles of masses m1 and m2 are separated by distance d and the origin coincide with the particle of mass m1. The position of the centre of mass (com) of this two particles is given by


In figure (b), In which the co-ordinate system has been shifted leftward. The position of the centre of mass is


Similarly for y and z-axis

\(y_{com}=\frac{{m_1}{y_1}+{m_2}{y_2}}{{m_1}+{m_2}}\) and



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