1. Day 1 Motion vocabulary
SCI 10 Physics

2. Physics
The science that deals with matter and energy and their interactions.
Examples:
motion, light, electricity, gravity, radiation, etc.
from atomic particles to the universe...

3. Kinematics The study of motion in a straight line.
Motion: the process of changing position.

4. Reference point
a starting point used to describe the location or position of an object
How would you describe:
Your location right now?
The location of the school?

5. Scalar vs. Vector Quantities
Scalar measure: A quantity that has magnitude (size), but no direction.
Ex:
Vector measure: has a magnitude AND a direction

6. Position Position ( ): an object’s location Initial position
Includes distance and direction from a reference point
Units= meters (m)
Vector measure
Ex: The crash was 24.5 km south of Exit 3
Initial position
Final position
direction
distance
reference point

7. Distance (d ): di  initial distance df  final distance
total length travelled
Units: meters (m)
Scalar quantity
di  initial distance df  final distance
∆d  distance travelled
Formula: ∆d = df – di or ∆d = d1 + d2
Ex: From my house, I walked 2 km to the store then returned home. The distance travelled is
2 km + 2 km = 4km

8. Displacement ( )
Displacement ( ): straight line distance from one point to another
The difference between the final position ( ) and the initial position ( )
Unit: meters (m)
Vector quantity
Displacement is the change in position
Δ = change

10. Time Interval Time (t): units = seconds (s) Scalar quantity
Time interval (Δt ): The difference between the final time (end time) tf and the initial (start) time ti.
Δt = tf - ti
Change in time = final time minus initial time

11. Practice Determine the following time intervals. From 8:15am to 8:45am
From 10s to 55s
From 1:30pm to 4:00pm
ti = 6.3s and tf = 13.8s
∆t = 30min
∆t = 45s
∆t = 2.5 hours or
∆t = 150min
∆t = 7.5s

12. Think About It: What is the reference point?
What is the person’s initial position?
What is the person’s final position?
What distance did the person travel?
What was the time interval?

13. Practice
What is the total distance covered by race car drivers at the Indianapolis 500 (cars do 200 l aps of a 2.5 mile track)?
What is the displacement of a race car driver at the Indy 500?
Mrs Purcell is walking in the forest. She doesn’t know it but she is 5m north of a rattlesnake. She walks 4m east, 3m south, 4m west and finally 2m north. Will she walk on the snake?

14. Practice A skier moves from A to B to C to D.
What is the total distance travelled by the skier?
What is the skier’s total displacement? A
0 min C
2 min D
3 min B
1 min
40 m
40 m
100 m

15. 2 options for calculating displacement
Subtract the change in position using
For total ,add all displacements with appropriate – or + symbols

16. To Do Day 1 Practice Day 2 Scalar and Vector Quantities Practice
Day 2 Practice - Determining Distance, Displacement, and Time(