Then we started Unit 1. If you have any questions about the previous homework or any of the review material, please let me know.
Unit 1: KINEMATICS
How things move.
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| Where is the dancer? What do we need to know to describe her position? |
How do we describe where things are located?
Ex: Where is Vancouver?
You need to know where you are starting from, a reference point.
If we use Toronto, we can say go WEST 3350 km.
Answer: Vancouver is 3350 km WEST of Toronto.
Ex: Halifax is 1260 km EAST of Toronto.
We need to describe the distance AND the direction to get a position.
This is an example of a VECTOR.
VECTOR = a quantity with a magnitude and direction
SCALAR = a quantity with magnitude
Here are some examples of vectors and scalars:
Scalars
|
Vectors
|
Distance, d
Speed, v
Mass, m
Time, t
Volume, V
Energy, E
|
Displacement
Velocity
Force
Magnetic Field
|
We can represent vectors with arrows:
Vancouver Toronto Halifax
<----------------------------x------------>
magnitude is represented by the length of the arrow.
The first vector we will talk about is called displacement.
DISPLACEMENT: a change in position.
displacement = final position – initial position
Example: If I travel from Halifax to Vancouver, what is my displacement?
Think about how you answer this question and what you would write to show your work.
Today was a short class, so this is as far as we got. Tomorrow we will continue!
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