09. The streetlight A is attached to the end of the horizontal boom ABO. The light, which weighs 100 N, is subjected to a wind load of 20 N acting in the negative y-direction. The forces P and Q represent the tensions in the two cables that are attached at point B. The resultant of the four forces shown is a force R acting at point O. Determine the tensions P and Q and the force R. 1.5 m SUMMARY OF ANSWERS 1.5 m Q 2 m 20 N B A 4 m -2 m 100 N

Q: 100 N A y -1.2 m 1.0 m

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Basic Terminology in Mechanics

The area of science and mathematics concerned the motion of the objects, the relation between the force matter, and motion if specified. Forces exerted over the objects result in displacements or changes in the position of an object concerning its environment. This branch of physics keeps its roots in Ancient Greece in the form of the scripts of Aristotle and Archimedes.