thanks a bunch gneill. Your explanation of the fact that the line between their centers will have the same angular velocity about the center of mass was really helpful. So, if the distance of the center of the moon from the COM is roughly 81 times the distance of the the center of the Earth...
Hey, so I'm new to Physics Forums as a registered member, but I've been checking this site out for what seems likes years.
Homework Statement
Locate the center of the mass of the Earth-moon system with respect to the center of the Earth, and then find the orbital velocity of the Earth...