4. A rectangular piece of cardboard is bent along the edge of a table. The 20 N force is parallel to the xz plane. Determine the moment of the 20 N force about line AB.
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Since the force is parallel to the xz plane, it means that it is perpendicular to the y-axis. Therefore, the line of action of the force is a vertical line passing through the point where the force is applied. Show more…
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