Engineering Board Exam Reviewer · Engineering Mechanics · medium

A vertical load of 575 N hangs from joint A, which is supported by two members: AB, horizontal, and AC, inclined at 40° above the horizontal. Using the method of joints, what is the force in member AC?

  1. 369.6
  2. 750.61
  3. 894.54
  4. 482.48

Answer

C. 894.54

Solution

At joint A, Fy = 0: F(AC) · (40°) = 575 N, so F(AC) = 575 / (40°) = 894.54 N.

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