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,
Song Instead of a Kiss it to Robert Plant to see if he could duet with her on the song, a move she was furious about. Alannah has cited that it is one of her favourite songs from her catalogue. The song was chosen as the lead single from the "Rockinghorse" album. While Alannah liked the song and found it single-worthy, she was adamant about releasing the uptempo rocker "Our World, Our Times" instead of a ballad as the first single, but was overruled by the record company because they feared the political lyrics of that song would hurt its airplay and chart performance. The