1. Kinematics

2. Kinematics
The study of motion

3. What are words that are associated with describing motion?

4. How can we describe this motion?
Man Standing in Storm

6. Scalar quantities 2 parts: Vectors vs. Scalars Number Unit Examples:
Distance (d) – 5 m
Speed (v) – 15 km/hr
Time (t) – 8.0 s

7. Vector quantities 3 parts: Vectors vs. Scalars Number Unit Direction
Examples:
Displacement (d) – 5 m [E]
Velocity (v) – 15 km/hr [NW]
Acceleration (a) – 8 m/s2 [forward]

8. Note:
Square brackets indicate direction [E]
indicate that this quantity needs a direction

9. A Scalar/Vector Conversation
Sujeevan: Hey Rob, how do I get to the Bramalea City Centre?
Rob: Well, you go 30 m then you go 300 m and then 1 km and then you are there!
Sujeevan: ummm…. Thanks… I guess… Can you point me in the right direction?
Rob: Sorry, I only deal in scalar quantities.

10. Distance vs. Displacement
How far you travelled
Scalar – no direction needed
I ran 10 km
Displacement
A measure of how far you travelled from your starting point to your ending point
Vector – direction needed
I ended up 2 km [N] of where I started

11. Average Speed vs. Average Velocity
How fast you travelled, on average, in a period of time
v – speed
d – distance
t - time

12. Average Speed vs. Average Velocity
How fast (and in what direction) you travelled towards your destinition
v – velocity
d – displacement
t - time

13. Instantaneous Velocity
How fast you are moving a certain instant
Ex: The speed a cop identifies with a radar gun

14. Walking to Bramalea City Centre

15. Example:
Miraj walks 3 km [E] and then 4 km [N]. This takes 20 minutes. Calculate his:
Distance
Displacement
Speed
Velocity

16. Practice
Pg 10 # 1,3,4
Pg 13 # 8-10