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The objective of this video is to find internal forces and moments in a simply supported beam. First of all, the video shows the schematic of the beam supported by fixed support at left end and roller support at right end. The beam is subjected to a uniformly distributed load, 5 N/m across the length of the beam and a point load, 10 N at right end parallel with the beam. The video asks to find out the axial, shear and bending at 1 m away from the left end of the beam. Using the given information, the video then shows how to draw free body diagram for this exemplary problem.
Moving on, the video takes cut at critical point followed by the drawing of the FBD for the cut. Three internal reactions e.g., vertical and horizontal reaction forces and an anticlockwise bending moment are developed due to the cut which have been briefly examined in the video. Later, the video solves the unknown values of internal forces establishing the principle of equilibrium. It is suggested to do on hand practices to have good understanding on method of sections to solve such kind of problem.
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.