1. Starter 10/7-8 reference 2 units W (or -2) 2 units W (or -2) 8 units
The starting position is known as the point.
An object moves 5W (or -5) then 3E (or +3). Where is the object compared to its reference?
What is the displacement of the object in #2?
What is the distance the object traveled in #2?
What would the speed be if the distance in object #4 was in mile and took 8 min?
reference
2 units W (or -2)
2 units W (or -2)
8 units
1mi/min

2. Speed

3. What do we know? Can’t move unless you give a reference position
Problems are much easier if you draw them out
If 2 people have different reference points, they see different events

5. Speed Speed = distance time UNITS- meter/second (m/s)
d=s  t d
s t  ÷
t =d ÷ s
Speed = distance
time
UNITS-
meter/second (m/s)
kilometer/hour (km/h)
feet/second (ft/s)

6. Different speeds?
Constant speed = speed that doesn’t change (cruise control)
Instantaneous speed = speed at a given time

7. ÷ ÷ Average Speed d s t  Calculate average speed
Final minus the initial
Total distance traveled
Total time traveled d
s t ÷ ÷ 

9. Distance or Speed? 1.
Miles
Distance

10. Distance or Speed? 2.
Feet/second
Speed

11. Distance or Speed? 3.
ft/s
Speed

12. LY (lightyear) distance light travels in 1 year Distance
Distance or Speed? 4.
LY (lightyear) distance light travels in 1 year
Distance

13. Distance or Speed? 5.
m/s
speed

14. Distance or Speed?
Yards
Distance

15. Distance or Speed? cm
Distance

16. Distance or Speed? 6.
cm/hr
Speed

17. What is the speed of an object that travels 5mi in 10 hours?
Speed Time! 7.
What is the speed of an object that travels 5mi in 10 hours?
5mi/10hr = 0.5mi/hr

18. What is the speed of an object that travels 10mi in 5 hours?
Speed Time! 7.
What is the speed of an object that travels 10mi in 5 hours?
10mi/5hr = 2mi/hr

19. What is the speed of an object that travels 1mi in 10 hours?
Speed Time! 8.
What is the speed of an object that travels 1mi in 10 hours?
1mi/10hr = 0.1mi/hr

20. What is the speed of an object that traveled for 15 seconds over 5m?
Speed Time! 9.
What is the speed of an object that traveled for 15 seconds over 5m?
5m/15s = 0.3m/s

21. What is the distance of an object that traveled 5m/s in 10s?
Speed Time!
10.
What is the distance of an object that traveled 5m/s in 10s?
5m/s ×10s = 50m

22. What is the distance of an object that traveled 10mi/s in 10s?
Speed Time!
11.
What is the distance of an object that traveled 10mi/s in 10s?
10mi/s ×10s = 100mi

23. What is the speed of an object that traveled for 100hr over 500mi?
Speed Time!
12.
What is the speed of an object that traveled for 100hr over 500mi?
500mi/100hr = 5mi/hr

24. What is the time an object traveled if they went 5mi/hr over 20mi?
Speed Time!
13.
What is the time an object traveled if they went 5mi/hr over 20mi?
20mi / 5mi/hr = 4hr

25. Speed Time!
14.
An object traveled in a circle of 100m. It took the object 100s. What is the speed of the object?
100m / 100s = 1m/s

26. Practice
A runner left his house and ran 8 km West, 5 km North, and 1 km East. Explain how he can get back to his house the quickest.
7 km East & 5 km South

27. Practice
A runner left his house and ran 5 km West, 10 km North, and 1 km South. Explain how he can get back to his house the quickest.
5 km East & 9 km South

31. Conclusion Support Groups of 3 support Speak, Write, & Question
Data included
Supported/rejected
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