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The objective of this video is to calculate impulse of an object to deduce final momentum & velocity. First part of the video jumps straight to the given exemplary problem where it has shown that a box of 50 kg mass is dragged across a smooth, frictionless surface by a 90 N force applied at 30 degree to the horizontal. The video asks to find out the final velocity of a wooden box if the force is applied for 10 seconds. The gravitational acceleration is given as 10 m/s2.
Moving on, the video explains the given schematic diagram of the problem and shows how to draw the free body diagram elaborating all the facts & figures in greater details. Next, the video resolves force components in y direction to find the value of normal force. Later, the video uses the obtained value as input to the integral formula of impulse & thus calculates the value of impulse. Finally, the video uses the impulse and momentum equation to find out the final velocity of the wooded box.
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.