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This video represents a comprehensive example of solving an equilibrium problem using free body diagram. First of all, the video introduces with the given exemplary diagram that shows a block is at rest condition over a slope having 30 degree angle with the ground. The mass of the block has given as 1 kg whereas the gravitational acceleration is 10m/s2. The block has been hold back by a tension force and it has been assumed that there is no frication force acting over the block. Moving on, the video works out on external forces and subsequently determines the value of gravity force.
Next, the video draws the free body diagram showing the working direction of gravity force, tension force and reaction force over the given slope. Later, the video uses the drawn free body diagram to resolve the forces into its components in x and y direction and successively finds out the unknown values of tension and reaction forces from the resolved equations of forces components. Overall, the video tries to give a brief inside on using FBD to establish equilibrium to solve mechanics 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.