Physics I Essentials
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Physics I Essentials - The Editors of REA
Thermodynamics
CHAPTER 1
Vectors and Scalars
1.1 Basic Definitions of Vectors and Scalars
A vector is a quantity that has both magnitude and direction.
i) Some typical vector quantities are displacement, velocity, force, acceleration, momentum, electric field strength, and magnetic field strength.
A scalar is a quantity that has magnitude but no direction.
i) Some typical scalar quantities are mass, length, time, density, energy, and temperature.
1.2 Addition of Vectors —Geometric Methods
Triangle Method (Head-to-Tail Method)
Figure 1.1Triangle Method of Adding Vectors
Parallelogram Method (Tail-to-Tail Method)
Figure 1.2The Parallelogram Method of Adding Vectors
1.3 Subtraction of Vectors
). (See Figure 1.3.)