1. Motion

2. Learning Scale – I can …
4 – Design an experiment to demonstrate how forces affect the motion of an object. 3 – Describe and explain that an unbalanced force changes an object’s speed and/or direction. - Interpret & analyze distance-time graphs. 2 - Calculate the speed, time, and distance of a moving object. 1 – Describe how forces affect the motion of an object.

3. Describing Motion
An object is in motion if the distance from another object is changing.
A reference point is the starting point you choose to describe the location, or position of an object.
Position is an object’s distance and direction from a reference point.

4. Think Pair Share – Describe how you would get to the bakery.

5. Distance vs. Displacement
Displacement is the distance between the starting point and finish point.
Distance is the length traveled.

6. Speed Constant Speed = speed stays the same
Instantaneous Speed = speed at a specific instant in time.
Speed changes when you:
slow down
speed up
stop

7. Velocity Velocity is the speed AND direction of a moving object.
Velocity changes when:
speed changes
direction changes
both change

8. Think Pair Share – Explain this diagram.

9. Think Pair Share – Differentiate between speed and velocity.

10. Acceleration
Acceleration is a change in velocity during a period of time.
Acceleration changes due to a change in speed or a change in direction.
Negative acceleration = slowing down
Positive acceleration = speeding up

11. Speed & Velocity Formulas
Speed = Distance
Time
Average Speed = Total Distance
Total Time
Distance = Speed X Time
Time = Distance
Speed

12. An easy way to solve problemsD S T

13. Example
An eagle flies 300 m in 12 s, what was its average speed? Speed = distance/time Speed = 300m/12 s Speed = 25 m/s

14. Practice Problems
1. A mail truck takes 20 s to move between mailboxes that are 10 m apart. What is the average speed of the mail truck?
2. Sound travels 330 m/s. You hear the sound of the bat hitting a home run 0.5 s after you see it. How far away are you?

15. 4. If a train travels 120 km at 30 km/h, how long will it travel?
3. Two cities are 250 km apart. How much time will it take to travel from one city to the other at 100 km/h?
4. If a train travels 120 km at 30 km/h, how long will it travel?

16. 5. Steve swims 10 m in 20 s. What is his average speed?

17. Learning Scale – I can …
4 – Design an experiment to demonstrate how forces affect the motion of an object. 3 – Describe and explain that an unbalanced force changes an object’s speed and/or direction. - Interpret & analyze distance-time graphs. 2 - Calculate the speed, time, and distance of a moving object. 1 – Describe how forces affect the motion of an object.