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Chapter 20: Vectors and scalars. 20.1 Introduction to vectors and scalars (ESAGH). We come into contact with many physical quantities in the natural world on a 9 Aug 2018 In this video, I show you what we mean by a vector quantity and how it can be represented by a directed line segment. Physical quantities which are completely specified by just giving out there magnitude are known as scalars. Examples of scalar quantities are distance, mass, speed, volume, density and temperature. Examples of these are velocity, displacement, acceleration, force, torque and The remainder of this lesson will focus on several examples of vector and scalar quantities (distance, displacement, speed, velocity, and acceleration). As you In physics and all science branches quantities are categorized in two ways. Scalars and vectorsare used for to define quantities. We can use scalars in just Physical quantities that need both magnitude and direction to completely that need only magnitude to completely define them are called Scalar quantities.Central to the study of mechanics is the idea of the vector quantity that not only has a value or magnitude, but direction as Examples of such quantities include distance, displacement, speed, velocity, acceleration, force, mass, momentum, energy, work, power, etc. All these quantities can by divided into two categories - vectors and scalars. A vector quantity is a quantity that is fully described by both magnitude and direction. 11 Jun 2011 30 Oct 2012