Cable spreading room at Point Tupper. In the electrical wiring of buildings, a cable tray system is used to support insulated electric cables used for power distribution and communication. Cable trays are used as an alternative to open wiring or electrical conduit systems, and are commonly used for cable management in commercial and industrial construction.
Static friction must be overcome. Once a force has been applied that starts the object in motion, the force of kinetic friction is less than its static counterpart. 1 person found this useful. Edit.
Friction is a force that opposes motion and wastes energy. Some of the energy used to create the forces that move objects is also used to overcome oppositional forces due to friction. Friction reduces the efficiency of machines and mechanisms, and good designers are always looking for ways to minimize friction.