As explained by BAretired, I think Hibbeler is referring to the couple moment as free vector because when a couple moment is applied on a body, it is same through the body at any point. Whereas, with a moment of a single force (and not a couple) is different at different location as moment is...
Thank you every one for replying. Sorry for posting an unclear question. I am a noob in mechanic. What I meant to ask was, R.C. Hibbeler’s statics textbook 14th edition (page 209) explains Fixed support will prevent both translation and rotation of a beam and to do this a force and couple moment...
Why is the reaction moment at a fixed support a couple moment and not a moment specific to a point? Is this reaction couple moment created in order to counteract the couple moment created by the applied force and reaction force at the fixed support?
Thank you in advance.
