CE 2450 Chapter : Student Handout Lesson 12

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15 Mar 2019
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4. 7 simplification of a force and couple system. Reduce a system of forces and couple moments to an equivalent system with a single resultant force acting at a specific point and a single resultant couple moment. A system is equivalent if the external effects it produces on a body are the same as those caused by the original system. If the body is free to move, external effects are translation and rotation. If the body is restricted, external effects are the reactive forces at the supports. If the line of action of the force passes through the point we wish to move it to, we can simply move the force (free vector) If the line of action of the force does not pass through the point we wish to move it to, we must move it and add a couple. M couple moment acting on the system. Mo moment of a force acting on the system about point o.

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