1. Speed
How fast does it go?

2. Event that involves a change in the position or location of something.
Definition of Motion
Event that involves a change in the position or location of something.

3. Speed
Comparison of time and distance
Distance traveled per unit time

4. Average Speed
Speed over a period of time

5. Speed Instantaneous Speed
Speed at any instant

6. Speed Constant Speed Speed that does not change
Instantaneous speed that does not change

7. Velocity
Speed AND direction

8. Calculating Speed Given Distance & Time
Divide Distance by Time
Distance ÷ Time = Speed
Speed = Distance ÷ Time

9. Let’s Practice Solve for Speed
A runner completes a 400m race in 43.9s. What was his speed?
Distance
Speed =
Time
400m
Speed =
43.9s
Speed =
9.1m/s2

10. Let’s Practice Solve for Speed
A runner runs a 100m race in 10s. What is his speed?
Distance
Speed =
Time
100m
Speed =
10s
Speed = 10m/s2

11. Calculating Distance Given Speed & Time
Multiply Speed and Time
Distance = Speed X Time
Speed X Time = Distance

12. Calculating Time Given Distance and Speed
Divide Distance by Time
Distance ÷ Speed = Time
Time = Distance ÷ Speed

13. Acceleration A change in velocity Speeding up Slowing down
Positive acceleration
Slowing down
Negative acceleration
Deceleration
Changing direction

14. Calculating Acceleration
Acceleration Equation
(final speed (in m/s) – initial speed (in m/s))
Acceleration =
Time (in seconds)
(sf-si) A= t