 
Summary: 12.2 Vectors
Basic Definitions
· Scalar quantity: A physical quantity which has only a magnitude
is called scalar
· Vector quantity: A physical quantity which has a magnitude and a
direction is called vector
Scalar quantities area, length, mass and temperature
Vector quantities force and displacement
· Geometric representation of vectors
By arrows (as shown in figure)
A
B
Initial point
Terminal point
length of arrow = magnitude of vector
direction of arrow = direction of vector
A
B
v
v AB=
