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.
Static friction always opposes relative motion at the point of contact. There are two cases possible: 1)It orients itself in direction and magnitude in such a way that the relative acceleration of the contact point is zero. 2)If this is not possible(such as in friction is too small to prevent motion),it tries to minimize the relative acceleration.