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The objectives of this video are to briefly discuss on potential energy, kinetic energy & conservation of mechanical energy. At first, the video looks at potential energy which expresses the capacity of an object to do work & subsequently gives introductory overview to different types of potential energy that include gravitational potential energy & elastic potential energy. Next, the video demonstrates conservative force and conservation of energy clearing the core concept that the mechanical energy is conserved if only conservative forces are applied to an object or a system.
The theory of conservation of energy states that the total energy before and after must be the same and the energy may be converted from kinetic to potential & vice versa. Moving on, the video shows a workout on example that asks to find out the speed of a stone travelling at 10 m above the ground using the conservation of mechanical energy. It has given that the stone is kicked off a building and fall toward the ground. At 40m from the ground it is travelling at 30m/s. The mass and gravitational acceleration of the stone have also given respectively as 0.1 kg and 9.8 m/s2.
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.