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We are going to go through a simple engineering calculation case study and we are going to solve it in excel. A 100 kg sign which is hung from the end of a horizontal support beam. It is hinged to a wall. The beam and sign are supported by a cable attached to the beam and above to the wall. The beam is 2.5 m long, the cable is 3 m and the beam and cable weigh a small amount when compared to the sign. Find the attachment position from the cable to the beam that minimizes the tension in the cable. It always helps to draw a diagram. We have a wall over here on the left. We have a beam that is hinged. We have a cable here. The cable has a length of c which for this particular example is 3 m. The length of the beam here L is 2.5 m. T is the tension that is in that cable. If we have too big of a mass as the mass goes up the tension will go up and might even snap. Attachment position of the cable is x. Then we have the mass of the sign which is M. Lets try to solve this in excel.