ch12s2 - 12.2 Vectors Scalars are quantities that only have...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
12.2 Vectors Scalars are quantities that only have a magnitude like mass, speed, and electric field strength. Many times it is often useful to have a quantity that has not only a magnitude but also a direction; such a quantity is called a vector . Examples of quantities represented by vectors include velocity, acceleration, and virtually any type of force (frictional, gravitational, electric, magnetic, etc.). Note that all of these quantities not only have a magnitude (such as speed – the magnitude of the velocity vector) but also occur or act in a given direction. It is convenient to represent both quantities by just one symbol, the vector. Graphically, a vector is represented by an arrow, defining the direction, and the length of the arrow defining the vector's magnitude. A two-dimensional vector is an ordered pair 12 , aa = a of real numbers. A three-dimensional vector is an ordered triple 123 ,, aaa = a of real numbers. The numbers a 1, 2, and 3 are called the components of a.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/20/2012 for the course MATH 2057 taught by Professor Estrada during the Fall '08 term at LSU.

Page1 / 2

ch12s2 - 12.2 Vectors Scalars are quantities that only have...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online