Static equilibrium is when resultant force and resultant moment equals to zero

Any static force system will be in equilibrium if the resultant force and resultant moment both are equal to zero.

Static equilibrium can be expressed as

ΣFx = ΣFy = ΣFz = 0                          (1)

ΣMx = ΣMy = ΣMz = 0                          (2)


F = force (N, lb)

M = moment (Nm, ft lb)

x, y, z = orthogonal axes

Related Topics

  • Mechanics - Forces, acceleration, displacement, vectors, motion, momentum, energy of objects and more
  • Statics - Loads - force and torque, beams and columns

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