1. P.S. 10.1 Notes “Measuring Motion”

2. Pg. 323 Practice Q’s 1-3 1. 1.5 m/s towards shore 2. 22 m/s towards first base 3. 60,000 m or 60 km

3. Inquiry Activity - How does the height of a ramp affect a rolling marble? (Create a hypothesis) 1. Select a ramp and get a marble. 2. Use 3 books to give one end of the ramp height. Record the time it takes for the marble to travel the length of the ramp. 3. Test two more times. 4. Double the height of your ramp (use 6 books). Record the time it takes for the marble to travel the length of the ramp. 5. Test two more times. 6. Determine the average speed of the marble for the 1 st ramp and 2 nd ramp. 7. **What conclusions can you make about the height of the ramp and the speed of the marble? Use data to back up your answer.**

4. I. Motion A. Movement – change in position B. How do you know something moves? 1. You can see it happening (observe) 2. Use other senses as well… 3. What about slow moving objects? Use reference points a. Sun, plants, seasons…

5. II. Distance vs. Displacement A. Distance – length of path taken… 1. Use appropriate units…Mississippi River Appropriate – 3780 km Inappropriate – 3,780,000,000,000 μm B. Displacement – the distance from start to finish. 1. Include a direction (N, E, S, W) B C A A boy walks from his house (A)to school (B) and then from school to his friend’s house (C). 2 blocks 4 blocks 5 blocks

6. Similar to fig. 4 on page 331 in textbook Start Finish

7. III. Speed A. Def - How fast something moves (rate of change) B. Requirements for speed 1. Distance traveled – 30 meters, 30 miles, 30 inches. 2. Time – how long it took to move a certain distance. – 3hrs, 3 min, 3 ms.

8. C. Calculating speed 1. Formula = Speed = DistanceV = Speed TimeD = Distance TimeD = Distance T = Time

9. D. 3 Types of Speed 1. Instantaneous speed = speed at one moment  88 mph  177 km/hr 2. Constant Speed = speed that does not change over a period of time. not change over a period of time.  using cruise control…

10. a. Ex: What is the constant speed of the car in the following graph?

11. 3. Average Speed a. Def – the total distance divided by the total time. b. Ex: A deer walked 5 m in 10 min, 8 m in 23 min, and 7 m in 7 min. What was its average speed?  5+8+7=20 meters  10 + 23 + 7 = 40 min  formula v = d/t  20 meters / 40 min  0.5 meters / min

12. E. Distance Time Graph 1. Def – seeing the motion of an object over time.

13. In Class Questions– separate sheet of paper 1. A car traveled 325 km in 4.5 hours. What was its average speed in km/hr? What was its average speed in m/s? 2. A train speed along at 50 km/h for 8.25 hours. What was its distance in km? What was its distance in meters? What was its distance in mm? 3. How many hours would it take for a car to travel 450 km at a rate of 35 km/hr? 72.2 km/hr 20 m/s 412.5 km 412,500 m 412,500,000 mm 12.9 hours

14. IV. Speed vs. Velocity A. Use same formula  velocity = distance / time B. Uses different labels  Speed – how fast something moves 1. Ex: a tornado is moving 15 mph.  Velocity – how fast something moves in a certain direction. 1. Ex: a tornado is moving 15 mph to the north.

15. C. Examples 1. 2 motorcycles traveling down the interstate in opposite directions at 70 mph?Speed / Velocity? 2. 2 bikers traveling 70 mph along a path in the same northern direction? Speed / Velocity? 3. 2 walkers walking down the road side by side at 5 mph? Speed / Velocity? 4. What is the velocity of an object that travels 70 miles in 1.5 hours from Rock Rapids towards Sioux City? Speed Velocity Speed 46.7 mph South

16. D. In class Questions 1. What is the velocity of an airplane that is traveling from Mexico to Canada. It traveled 1400 miles in 4.5 hours? 2. What is the velocity of a tornado that is traveling from Omaha to Des Moines. It took 5.75 hours and traveled 200 miles? 311 mph North 34.8 mph East