Engineering Board Exam Reviewer · Engineering Mechanics · medium

For a rigid body to be in complete static equilibrium in two dimensions, which set of conditions must be satisfied?

  1. Fx = 0, Fy = 0, and M = 0
  2. Fx = 0 only
  3. M = 0 only
  4. Fx = Fy only

Answer

A. Fx = 0, Fy = 0, and M = 0

Solution

Equilibrium in a plane requires the sum of forces in each of two directions to be zero, and the sum of moments about any point to be zero.

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