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The objectives of this video are to develop shear force diagram from free body diagram and method of section. First of all, the video shows an exemplary beam asking to develop a shear force diagram for the beam. The beam is supported by a roller support at left end and a fixed support at 3 m away from the right end. It has also given that the beam is 7 m long and subjected to two point loads- one of 30 N at 2 m away from left end and another of 15 N just at the right end. Both the loads are acting downward in direction. Moving on, the video finds the support reactions and draws the FBD.
At second step, the video talks about to make cuts at critical points & the key doctrine for that is to make a cut every time a new force is applied to the beam. Using this concept, the video shows how to take cuts gradually one after another and to use the obtained value of internal forces to draw the shear force diagram. At end, the video briefly discusses the different point of shear force diagram as well as their nature explaining all the facts and figures in details.
Mechanics, the study of forces and physical bodies, underpins a very large proportion of all forms of engineering. A thorough understanding of mechanics is essential to any successful engineer. This course helps develop an understanding of the nature of forces with consideration for how they may be simplified in an engineering context. The conditions of equilibrium are then used to solve a number of problems in 2D and 3D before moving on to a broad range of topics including centroids, distributed loads, friction and virtual work. The course will also provide an introduction to dynamics, with a particular focus on the effects that forces have upon motion.