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A vector quantity has both magnitude and direction.
Myrtle Beach is 300 mi East of Clemson.
He drove with a
velocity of 80 km/h due East.
REMEMBER: Vectors will be written in
boldface
(
r
) or with an
arrow over them (
).
This is important in differentiating
between a scalar and a vector!
r
G
A scalar quantity has only ___________ and no direction.
This means we can fully explain a scalar with a number and a unit
It is 36
o
F on a cold winter day
The ball fell for a time of 1.25 s
The sled's kinetic energy was 0.54 J
The length of a meter stick is 1m
Vectors – Chapter 3
Coordinate Systems
A point can be located
on an x, y
coordinate system by
its coordinates
x and y.
(x, y)
y
The x and ycoordinates may be either positive or negative
VECTOR
We can describe the point (x,y) as a point located by a
_________
r
that has components of ___ and ____.
(x, y)
y
r
NOTE: Vectors will be written
in
boldface
(
r
) or with an
arrow over them (
).
r
G
Vectors
(x, y)
y
r
Our vector
r
can be written as
r = x + y
Or as
Please note: this is NOT the same
as r = _________!!!
y
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 Spring '08
 pope
 Energy, Kinetic Energy

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