A street lamp weighs 180 n. it is supported by two wires, Ask an Expert

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Q. A 40-lb roller of diameter 8 in. that is to be used on a tile floor is resting directly on the subflooring. Knowing that the thickness of each tile is 0.30 in., conclude the force P required to move the roller onto the tiles if the roller is moved to left.

Q. A street lamp weighs 180 N. It is supported by two wires that form an angle of 150° with each other. The tensions in the wires are equal.

(a) What is the tension in each wire?

(b) If the angle between the wires is reduced to 120°, what is the tension in each wire?

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