If we were going to use this definition to find the center of mass of the runner, we would break up their body into a bunch of little masses and find all their vector positions - it would take a long ...If we were going to use this definition to find the center of mass of the runner, we would break up their body into a bunch of little masses and find all their vector positions - it would take a long time 1 ! In this course, we will generally do things more like "find the center of mass between two objects of mass \(m_1\) and \(m_2\), separated by a distance \(d\)". So what are \(\vec{r}_1\) and \(\vec{r}_2\) in this situation?
