1. What are 3 types of motion exhibited by the air trolley during the lab? (be specific) 1. 2. 3. QOD#89 Circular motion – propeller Linear motion – air trolley Deformation – rubber band

2. Velocity Velocity – the speed and the direction of a moving object. Ex1: 2 m/s east 2 m/s west *same speed, different velocities

3. Speed or Velocity? 1.10 mph faster than a truck 2.100 mi/min. northeast 3.3.5 m/s 4.674 cm/s to the left

4. Ex2: The train is traveling north to Canada. It takes 5 hours to go 450 miles. Find the velocity. v = velocity v = d ΔtΔt v = 450 mi 5 h v = 90 mph north Don’t forget the direction when it asks for velocity!

5. Ex3: Birds are migrating south for the winter. They fly from STL to Miami, FL which is 1,216 miles. The trip takes 3 days. What is the velocity of the birds in mph? Round to the nearest tenth of a decimal. v = d/ Δ t v = 1,216 mi / 72 h v = 16.9 mph south

6. Speed & Velocity Practice WS

7. QOD#90 What is the velocity of a helicopter traveling 200 miles southwest to Springfield in 1.25 hours? v = d/ Δ t v = 200 mi / 1.25 h v = 160 mph southwest

8. Check your homework answers and turn the paper in to the box!

10. QOD #92 How long will it take a car traveling at 70 mph to go 280 miles?

11. Speed of Hot Wheel Cars Purposes: -To find the speed of hot wheel cars -To create a Speed (distance/time) graph Materials: Stop watch 3 hot wheel cars Track Meter stick Calculator

12. Procedures: 1.Measure the distance of your track in meters. 2.Measure the time it takes to car to get to the end of the track. 3.Record time in seconds (s). 4.Measure 3 trials for each car. 5.Calculate the average time for each car. 6.Calculate the speed of each car.

13. Speed of Hot Wheel Cars Car Distance (m) Time Trial 1 Time Trial 2 Time Trial 3 Average Time (s) Speed (m/s) Jobs: 1.Car releaser 2.Timer 3.Car retriever 4.Recorder Use these to make your SPEED GRAPH! Divide these to find SPEED!

14. Graph *The faster the speed, the steeper the line (or slope).

15. QOD #93 Find the velocity of a southbound train that travels 320 miles in 4 hours.

16. Speed Graphs A – Mouse travels 1 meter in 1 min. B – Mouse stops for 1 min. C – Mouse travels 2 meters in 1 min. D – Mouse stops for 1 min. E – Mouse travels 2 meters in 1 min. back toward where he started. Speed of a Mouse Time (min.)Distance (m) A B C D E

18. Mouse Races

19. Teasha’s and Josh’s Trips to School

20. Motion Graph Stories

21. QOD #94 Match the words to the correct letters on the graph. 1.Two minute stop 2.Increasing speed for 5 min. 3.Heading back home for 12 km (there are 2) 4.Four minute stop A B C D E

22. Due Thursday – beginning of class!

23. Story A. B. C. D. E. Graph

24. QOD #95 1.What does the line from 40s-70s represent? 2.How long does the trip take in total? 3.Calculate the speed of the object from 0-40s.

25. Writing Prompts: Turn in a rough draft w/edits and a final draft (2 papers) A.What steps should your family take to be better prepared for an earthquake? B.Describe the steps being taken to preserve the Puffin population. C.Describe how the Earth Harp works – details! D.What have scientists learned from Voyager 1 and what do they hope to learn in the future? How will this happen?

26. QOD#96 Johnny ran 6 mph south on Lindbergh. Is this a speed or velocity? Why?

27. Acceleration (Roller Coaster Ride) Acceleration – the measure of the change in velocity during a period of time. -rate of change of velocity (or speed) Units: m/s 2

28. An object accelerates if it speeds up, slows down, or changes direction. (This is what acceleration looks like on a Speed or Motion Graph)

29. (Roller Coaster Ride) (After you go over the answers, write down two of the examples of acceleration in your notebook.) Ex 1: Ex 2:

30. (Acceleration Demo) (Ask 3 volunteers to demonstrate acceleration by either speeding up, slowing down, or changing direction.)

31. Finding Acceleration (Challenge) acceleration = final velocity – initial velocity time a = v f – v i t or a = Δv t Deceleration = negative number

32. Ex1: A skater goes from a standstill to a speed of 6.7 m/s in 12 seconds. What is the acceleration of the skater? (Round to the nearest hundredth of a decimal.) a = v f – v i t a = 6.7 m/s – 0 m/s = 6.7 m/s 12 s 12s a = 0.56 m/s 2

33. Ex2: During a race, a sprinter increases from 5.0 m/s to 7.5 m/s over a period of 1.25s. What is the sprinter’s average acceleration during this period? (Round to the nearest tenth of a decimal.) a = v f – v i t a = 7.5 m/s – 5 m/s = 2.5 m/s 1.25 s a = 2 m/s 2

34. Finding Acceleration Practice