Question 2371
How is the total momentum related to the center of mass velocity?
Question 2372
What is the condition for the center of mass to move uniformly?
Question 2373
Why do binary stars appear to have complicated paths in the lab frame?
Question 2374
What is the shape of the orbit in the center of mass frame for equal mass binary stars?
Question 2375
In the lab frame, what governs the center of mass motion?