1. Observe and describe the motion of everyday objects (MW2)
Key Questions (MW2):
How can you tell if an object is in motion?
How can you tell if an object is speeding up or slowing down?
How can you tell if an object is undergoing uniform motion?
How does the choice of frame of reference influence the observation of motion and the motion itself?
How can you use your own movements to represent uniform and non-uniform motion?
Monday, October 22nd

2. Key Concepts (*Fill in Pink Sheet)
Motion at a constant speed in a straight line is called uniform motion.
All motion is measured relative to some frame of reference chosen by the observer
Scientific knowledge is based on observation
An operational definition of the physical sciences explains how to measure the quantity being defined

3. Introductory Brainstorming
Examples of Motion:
Give students handout MW2 observe and describe the motion of everyday objects

4. Examples of motion
Videos of Motion
Skateboards
Skis
Cars
Kiteboarding
Hockey
When viewing these videos, use your own words to describe the specific motion on the following slides

5. Description of Car Motion

6. Description of Skiing Motion

7. Description of Skateboard Motion

8. Description of Kiteboarding Motion

9. Description of Hockey

10. Words to Describe Motion
Words that describe motion
Forward
Backward
Fast
Slow Up
Down

11. Activity Time!
In groups of 3, develop a 20 second skit showing as many types of motion as possible.

12. How can you tell an object is in motion?
Words that describe motion
Reference to something else
Hearing a possible sound
Seeing if it moves

13. What senses can we use to observe motion?
How can you tell if an object is speeding up or slowing down?
How quickly or slowly it moves
The sound the object makes
What senses can we use to observe motion?
Sight
Hearing
Touch
Have students close their eyes and listen to the subway train getting closer
Show it again so they can see it getting closer
If we were at the subway station, we could feel the wind in the tunnel knowing it’s getting closer

14. Remarkable Feets Lab
Tuesday, October 22nd

15. How can you tell if an object is undergoing uniform motion?
Wednesday, October 22nd
How can you tell if an object is undergoing uniform motion?
Uniform Motion  Uniform motion describes an object travelling at a constant speed in one direction
Non-Uniform Motion  when the direction or speed of motion changes

16. Characteristics of Uniform Motion
1) Distance
Change in distance example:
If you start at rest and travel 3.5m, what is your change in distance?
Use: ∆ d = df – di
df = 3.5m
di = 0 m
∆ d = 3.5m – 0m
∆ d = 3.5m

17. Characteristics of Uniform Motion
2) Time
A measure of duration
Base unit is the second or “s”
In Physics when we talk about time, we are really referring to a change in time
Change in time = final time – initial time
Or… ∆ t = tf - ti

18. Characteristics of Uniform Motion
2) Time
Change in time example
It took you 1.1s to travel your distance from rest
Use ∆ t = tf – ti
tf = 1.1s
ti = 0s
∆ t = 1.1s – 0s
∆ t = 1.1s

19. Characteristics of Uniform Motion
3) Velocity
A measure of a specific distance travelled in a specific amount of time
Velocity = change in distance
change in time
Or… v = ∆ d
∆ t
Base unit for velocity is meters per second or “m/s”

20. Characteristics of Uniform Motion
3) Velocity
Example of velocity
Based on the previous two examples, how fast were you travelling?
Use v = ∆ d
∆ t
∆ d = 3.5m
∆ t = 1.1s
v = 3.5m
1.1s
v = 3.18 m/s

21. How does the choice of frame of reference influence the observation of motion and the motion of itself?
Example: You are driving down the highway gazing out the side window while passing a semi. The truck driver speeds up while you are trying to pass so you are going nearly the same speed. Do you feel like you are moving?
What about if you were driving down that same highway focusing on the center line instead of the truck beside you?
Does your perception of motion change based on your frame of reference?