Mechanical energy mechanical energy of the colliding objects has been converted into an equal amount of heat. Thus, the total energy of the system remains unchanged though the mechanical energy of the system has reduced. A satellite of mass formula_4 at a distance formula_5 from the centre of Earth possesses both kinetic energy, formula_6, (by virtue of its motion) and gravitational potential energy, formula_7, (by virtue of its position within the Earth’s gravitational field; Earth's mass is formula_8). Hence, mechanical energy formula_9 of a satellite is given by If the satellite is in circular orbit, the energy conservation equation can be further
Dalian Dalian Happy Snow World in Ganjingzi District near the airport. Not many people ride bicycles in Dalian because of the hilly roads. Dalian is also one of the many cities in China where there are few motorcycles, because motorcycle riding on most roads is banned by law. The city has a comprehensive bus system and an efficient metro system. As of November 2015, the Dalian Metro consists of the underground Line 1, Line 2, and the overground Line 12 (Formerly called line R2) and Line 3. New lines and expansion of the metro system are under way. The Dalian Tram