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The objective of this video is to use the knowledge of friction to deduce behavior of a loaded ladder against a wall. At first, the video describes the problem asking to find the minimum force required to move the ladder (tip or slip) assuming the wall is smooth means no friction in the wall. The mass of the ladder is given as 1 kg and the coefficient of static friction is given as 0.8 for the floor. All the required dimensions are given for the workout of the problem. Moving on, the video draws the FBD of the ladder showing the actions of all forces acting over the ladder.
Next, the video points out the fact to take in consideration to establish equilibrium conditions from the drawn FBD- one case either slipping or tipping must has to presume first. The video considers tipping condition & successively calculates the minimum force required to move the ladder. Later, the video shows how to cross check the obtained result against the given value of static friction and finally discusses what will happen if the ladder would slip instead of being tipped.
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.