Each sub system taken alone has an ability to continue to rotate due to the 148 units of kinetic energy by the end of each interval of {HEAD ~ movement}, which is the same as a potential energy in the initial position of {TAIL ~ movement} 
Each sub system taken alone has an ability to continue to rotate due to the 148 units of kinetic energy by the end of each interval of { HEAD ~ movement } , which is the same as a potential energy in the initial position of { TAIL ~ movement }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL