1. The problem statement, all variables and given/known data A binary star consists of two stars of mass 5.0 * 10 ^ 30 kg each and separated by a distance of 2.0 * 10 ^ 11 m . The stars rotate about their common center of mass. Determine their linear speeds. 2. Relevant equations F = GMm/r2 F = mv2/r Well I’m confused on what is the r value. How is the object able to move in a circular motion when the point at which its spinning about isn’t the center of the circle? And secondly when I’m using the formulae F = GMm/r2, is the r value 2.0 * 10 ^ 11 ? Hmm. Would appreciate any help given to solve this problem. Thanks in advance.