I removed the bit about relative velocities as it makes no sense. See the talk page. [[User:PeterIceHockey|PeterIceHockey]] ([[User talk:PeterIceHockey|talk]]) 12:58, 2 December 2016 (EST) | I removed the bit about relative velocities as it makes no sense. See the talk page. [[User:PeterIceHockey|PeterIceHockey]] ([[User talk:PeterIceHockey|talk]]) 12:58, 2 December 2016 (EST) |