Parallelogram Law and Triangle Method
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### Lecture Description

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The objectives of this video are to go through the parallelogram law for addition and subtraction of vectors followed by a brief discussion on triangle method used to do vectors addition & subtraction. At first, the video demonstrates the parallelogram law clearing the concept that if two vectors can be represented by two adjacent sides of a parallelogram then the diagonal of parallelogram will be equal to the resultant of these vectors regardless of the addition or subtraction operation. The video also talks about the difference of addition & subtraction operation explaining all the facts in details.

Next, the video briefly talks about the key points of parallelogram law-always join vectors tail to tail & subtraction is the same as adding the negative. Moving on, the video discusses on triangle method where vectors are joined tip to tail for addition and this is independent of orders of summation. The subtraction using the triangle method is very similar to parallelogram law. Later, the video explains vividly both the addition & subtraction operations of vectors applying triangle method.

### Course Description

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.