# Having trouble figuring center of mass between Sun and Jupiter

by lancel916
Tags: algebra, center of mass, equation, math
 P: 8 The center of mass expression is defined by the following: $\overline{R} = \frac{\sum_i^n \overline{x}_i m_i}{ \sum_i^n m_i }$ Where $x_i$ are the positions of the particles, an $m_i$ are the mases of these particles. In your example you have to do the following: $|\overline{R}_{sj}| = \frac{x_j m_j + x_s m_s}{m_j + m_s}$ Where $x_j$ is the position of jupiter, also $m_j$ the mass of it, and in the other hand you have the position of the sun $x_s$ and the mass of it $m_s$.