Conditions for co-planer concurrent forces to be in equilibrium

Q.  Which of the following conditions should be satisfied for co-planer concurrent forces to be in equilibrium?
- Published on 18 Sep 15

a. Σ Fx = Σ Fy = 0
b. Σ M = 0
c. Both a. and b.
d. None of the above

ANSWER: Σ Fx = Σ Fy = 0

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    Discussion

  • Garje Ankur   -Posted on 11 Sep 20
    Options C is correct (Both)
  • Sravanthi   -Posted on 16 Dec 15
    Co-planer concurrent forces: In this system, the concurrent forces acting on a body lie in a same plane. It consists of two or more forces, whose line of action intersect at a common point.

    This system consists of two equilibrium conditions,

    1) Σ Fx = 0
    2) Σ Fy = 0

    As both Σ Fx and Σ Fy is zero, resultant is also zero.

    Co-planer non-concurrent forces: In this system, the forces do not pass through a common point but lie in a same plane.

    This system consists of three equilibrium conditions,

    1) Σ Fx = 0
    2) Σ Fy = 0
    3) Σ M = 0

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