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 Institute of Science and Technology College has close tie with Wright State University, Ohio, U.S., and other colleges overseas. Address: 999-26 Binggang Road, Lüshun Economic and Development Zone, Dalian City <br> Phone: 0411-8624-5011 Dalian Institute of Science and Technology Dalian Institute of Science and Technology (), is a four-year engineering college, located in Lüshunkou District, Dalian City, Liaoning Province, China. It has its origin in the Information Technology Department, established in 2002, of Dalian Jiaotong University, and became in 2003 an independent school owned by both Jiaotong University and Dalian Sunshine Century Group. It was renamed in 2011 as Dalian Institute of Science and Technology.