A trolley wire has a mass of 1.2 kg per meter and is stretched between two poles spaced 20 meters apart. If the horizontal tension in the wire is 1500 kg, what is the sag at the midpoint of the wire?

Engineering Mechanics MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Engineering Mechanicsmechanical-engineering-mcqs › engineering-mechanics
Published
25 Jan 2019
Last updated
28 May 2026

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Explanation

Given the wire's weight per unit length, span length, and horizontal tension, the sag (dip) at the center can be calculated using the formula for sag in a uniformly loaded cable. The correct sag value in this case is 4.0 centimeters.

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