Mechanical energy swing because of the work done by the pendulum to oppose these non-conservative forces. That the loss of mechanical energy in a system always resulted in an increase of the system's temperature has been known for a long time, but it was the amateur physicist James Prescott Joule who first experimentally demonstrated how a certain amount of work done against friction resulted in a definite quantity of heat which should be conceived as the random motions of the particles that comprise matter. This equivalence between mechanical energy and heat is especially important when considering colliding objects. In an elastic collision,
Dalian Tornado F.C. Dalian Tornado F.C. Dalian Tornado Football Club () is an amateur Chinese football club that currently participates in the China Amateur Football League. The team is based in Dalian, Liaoning. Dalian Tornado was established in 2004. Dalian Tornado first entered the final stage of China Amateur Football League in 2011 and won champions. They became a fixture of the Amateur Football League final as well as the Chinese FA Cup. After a stellar 2015 season, The club had to sell their Chinese FA registration and entire first-team to Dalian Boyoung F.C.. The following 2017 league campaign saw the club start