These are the kidns of questions that I have the most problems with. Here's the specific question: "A uniform steel beam of length 5 m has a weight of 4.5x10^3 N. One end of the beam is bolted to a vertical wall. The beam is held in a horizontal position by a cable attached between the other end of the beam and a point on the wall. The cable makes an angle of 25 above the horizontal. A load whose weight is 12x10^3 N is hung from the beam at a point that is 3.5 m from the wall. What is the magnitude of the tension in the supporting cable? What is the magnitude of the force exerted on the ned of the beam by the bolt that attches the beam to the wall?" The problem I have is with the bolts, because I don't know what force this is and which direction it has; I initially did the question ignoring the bolts alltogether, until I discovered the second part of the question.