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The objective of this video is to use the conservation of mechanical energy concept to solve motion problem. First part of the video jumps straight to the given exemplary problem where it has shown that a ball on a string is connected to a hook in a wall and asks to calculate the velocity of the ball & the tension in the string just before it hits the wall if the ball is dropped from its initial position. The mass of the ball and gravitational acceleration have given respectively as 3 kg and 10 m/s2. Aside, the video briefly illustrates the given schematic diagram of the problem.
Moving on, the video illustrates the procedure to solve the problem starting with the consideration of initial and final states & successively calculates down the velocities of respective states. Next, the video equates initial state to final state that yields the velocity of the ball just before it hits the wall. Later, the video demonstrates how to draw FBD to deduce tension in the string resolving the force components in vertical direction using the concept of equilibrium. Do more practices to have better understanding on the workout example overviewed in this tutorial.
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.