4.19 Compute all reactions at the base A of the traffic light standard, given that the tension in the cable BC is (a) T = 2720 N; and (b) T=0. The weight of the standard is negligible compared with the 1600-N weight of the traffic light. 5m 5 m 2 m- T B B 7.5 m 7.5 m -4 m CA I Ay FBD Fig. P4.19 Ax OOOF 1600 N 1600 N

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Cables

Cables are collections of wires, alternatively referred to as a cord, connector, or plug. They are one or more wires covered in a plastic covering that allows for the transmission of power or data between devices. The earliest use of recognizable electrical cable was the early commercialized telegraph lines. These were iron-made and tedious to produce and install cabling.