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The objectives of this video are to consider more complex loading cases & determine internal forces from both ends of the beam. Very first, the video presents the schematic diagram of the exemplary problem & asks to find internal force at midspan. The schematic diagram shows a simply supported beam having a fixed support at left end & a roller support at right end. The beam is 8 m in length & subjected to 2 different types of loads i.e., a uniformly distributed load of 5 KN/m across 4 m length of the beam from right end and a point load of 10 KN at 3 m away from right end of the beam.
Moving on, the video draws the FBD followed by a workout showing how to determine the support reactions using the principle of equilibrium. Next, the video applies cuts at critical points and briefly talks about the two options available to calculate the internal forces at midspan. Later, the video considers the left cut & illustrates how to find internal forces i.e., axial, shear and bending moments at midspan of the beam. Finally, the video refers to watch next video to continue the lesson.
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.