• Card 26 / 36: Which of the following best describes a couple as used in mechanics?
    A) A moment resulting from forces with resultant force acting on the system
    B) A pair of forces acting in conjunction with no net moment
    C) A pair of moments that cancel one another
    D) A pair of forces that produce zero net force and zero net torque
    E) The reduction of all forces acting on a system to a pair of forces and moments

    Answer:
    A) A moment resulting from forces with resultant force acting on the system

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Explanation:

The couple refers to a resultant moment with no resultant force. One can often use this concept to simply the way in which you think about a complex situation with many forces and moments acting.

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Mechanics I ME102

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Attribution:  Stephanie Redfern, Ranjeet (Ron) Agarwala, and Dr. Steve Gibbs. Mechanics I. The Saylor Academy 2014, http://www.saylor.org/courses/me102/
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