1 / 89

Ch3 – Metric Conversions

Ch3 – Metric Conversions. Ch3 – Metric Conversions “King Henry David Usually drinks chocolate milk” Giga . . Mega . . Kilo Hecta Deka Basic deci centi milli . . micro . . nano . . pico Units.

kylia
Télécharger la présentation

Ch3 – Metric Conversions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ch3 – Metric Conversions

  2. Ch3 – Metric Conversions “King Henry David Usually drinks chocolate milk” Giga . . Mega . . Kilo HectaDeka Basic decicentimilli. .micro . .nano. .pico Units

  3. “King Henry David Usually drinks chocolate milk” Giga . . Mega . . Kilo HectaDeka Basic decicentimilli. .micro . .nano. .pico Units (Meters) (Liters) (Grams) G . . M . . K H D U d c m . .μ. . n . . p

  4. “King Henry David Usually drinks chocolate milk” Giga . . Mega . . Kilo HectaDeka Basic decicentimilli. .micro . .nano. .pico Units G . . M . . K H D U d c m . .μ. . n . . p Exs: 505 grams = __________ kilograms 90 cm = __________ m 2.05 L = __________ mL 75 km = __________ m 75 nm = __________ m 700 μm = __________ m

  5. Describing Motion

  6. Describing Motion Vectors – Scalars –

  7. Describing Motion Vectors – describe things that have both magnitude and direction Use arrows to represent them. Scalars –

  8. Describing Motion Vectors – describe things that have both magnitude and direction Use arrows to represent them. Scalars – have only magnitude

  9. Describing Motion Vectors – describe things that have both magnitude and direction Use arrows to represent them. Scalars – have only magnitude Examples: 1. Speed (v) – vs. 2. Velocity ( ) –

  10. Describing Motion Vectors – describe things that have both magnitude and direction Use arrows to represent them. Scalars – have only magnitude Examples: 1. Speed (v) – how fast something is going vs. 2. Velocity ( ) –

  11. Describing Motion Vectors – describe things that have both magnitude and direction Use arrows to represent them. Scalars – have only magnitude Examples: 1. Speed (v) – how fast something is going vs. 2. Velocity ( ) – how fast its going in a particular direction

  12. Describing Motion Vectors – describe things that have both magnitude and direction Use arrows to represent them. Scalars – have only magnitude Examples: 1. Speed (v) – how fast something is going vs. 2. Velocity ( ) – how fast its going in a particular direction 1. Distance (d) – vs. 2. Displacement ( ) –

  13. Describing Motion Vectors – describe things that have both magnitude and direction Use arrows to represent them. Scalars – have only magnitude Examples: 1. Speed (v) – how fast something is going vs. 2. Velocity ( ) – how fast its going in a particular direction 1. Distance (d) – how far something moves vs. 2. Displacement ( ) –

  14. Describing Motion Vectors – describe things that have both magnitude and direction Use arrows to represent them. Scalars – have only magnitude Examples: 1. Speed (v) – how fast something is going vs. 2. Velocity ( ) – how fast its going in a particular direction 1. Distance (d) – how far something moves vs. 2. Displacement ( ) – how far something moves in a particular direction. (Straight line distance)

  15. Displacement = velocity . time d = v . t

  16. Displacement = velocity . time d = v . t Measure velocity in: miles per hour (mph) Kilometers per hour (km/hr) Meters per second (m/s)

  17. Displacement = velocity . time d = v . t Measure velocity in: miles per hour (mph) Kilometers per hour (km/hr) Meters per second (m/s) Ex: A car passes a sign that reads 40.1 km while traveling east thru a straight valley. 30 minutes later it passes a sign that reads 84.5 km. How fast was the car traveling? (Use m/s) Ch3 HW#1 1-3 + metric conversions

  18. Ch3 HW#1 1. A desert tortoise covers 1.5 m in 45 sec. What is its speed? 2. A bicyclist travels 55 km in 1 hr 30 mins. Speed? 3. Car passes sign that reads 25.6 km traveling north. 1 hr 15 min later it passes a sign that reads 115.2 km. Speed? Metric Conv 1. 7 mm = _____ cm 5. 6.3 cm = _____ m 9. 7.2 μ = _____ cm 2. 8.1 mm = _____ m 6. 3.3 cm = _____ km 10. 1.2 km = _____ nm 8.2 mm = _____ km 7. 3.6 m = _____ km 11. 1.7 km = _____ cm 4. 7.5 cm = _____ mm 8. 5.2 pm = _____ mm

  19. Ch3 HW#1 1. A desert tortoise covers 1.5 m in 45 sec. What is its speed? (d=vt) 2. A bicyclist travels 55 km in 1 hr 30 mins. Speed? 55 km = 55,000 m 1.5 hr 3600 sec 1 hr 3. Car passes sign that reads 25.6 km traveling north. 1 hr 15 min later it passes a sign that reads 115.2 km. Speed? d = 115.2 – 25.6 = 89.6 km = 89,600 m 1.25 hr 3600 sec 1 hr = 5400 sec = 4500 sec

  20. Ch3 HW#1 1. A desert tortoise covers 1.5 m in 45 sec. What is its speed? (d=vt) 2. A bicyclist travels 55 km in 1 hr 30 mins. Speed? 55 km = 55,000 m 1.5 hr 3600 sec 1 hr 3. Car passes sign that reads 25.6 km traveling north. 1 hr 15 min later it passes a sign that reads 115.2 km. Speed? d = 115.2 – 25.6 = 89.6 km = 89,600 m 1.25 hr 3600 sec 1 hr = 5400 sec = 4500 sec

  21. Ch3 HW#1 1. A desert tortoise covers 1.5 m in 45 sec. What is its speed? (d=vt) 2. A bicyclist travels 55 km in 1 hr 30 mins. Speed? 55 km = 55,000 m 1.5 hr 3600 sec 1 hr 3. Car passes sign that reads 25.6 km traveling north. 1 hr 15 min later it passes a sign that reads 115.2 km. Speed? d = 115.2 – 25.6 = 89.6 km = 89,600 m 1.25 hr 3600 sec 1 hr = 5400 sec = 4500 sec

  22. Ch3 HW#1 Metric ConvG . . M . . KHDUdcm . . μ . . n . . p 1. 7 mm = ____ cm 2. 8.1 mm = ______ m 8.2 mm = ________ km 7.5 cm = ___mm 5. 6.3 cm = _______ m 6. 3.3 cm = ________ km 7. 3.6 m = _______km 8. 5.2 pm = ____________mm 9. 7.2 μm = _______ cm 10. 1.2 km = ______________nm 11. 1.7 km = ______ cm

  23. Ch3 HW#1 Metric ConvG . . M . . KHDUdcm . . μ . . n . . p 1. 7 mm = 0.07 cm 2. 8.1 mm = 0.0081 m 8.2 mm = 0.0000082 km 7.5 cm = 75 mm 5. 6.3 cm = _______ m 6. 3.3 cm = ________ km 7. 3.6 m = _______km 8. 5.2 pm = ____________mm 9. 7.2 μm = _______ cm 10. 1.2 km = ______________nm 11. 1.7 km = ______ cm

  24. Ch3 HW#1 Metric ConvG . . M . . KHDUdcm . . μ . . n . . p 1. 7 mm = 0.07 cm 2. 8.1 mm = 0.0081 m 8.2 mm = 0.0000082 km 7.5 cm = 75 mm 5. 6.3 cm = 0.063 m 6. 3.3 cm = 0.000033 km 7. 3.6 m = 0.0036 km 8. 5.2 pm = 0.000 000 0052 mm 9. 7.2 μm = _______ cm 10. 1.2 km = ______________nm 11. 1.7 km = ______ cm

  25. Ch3 HW#1 Metric ConvG . . M . . KHDUdcm . . μ . . n . . p 1. 7 mm = 0.07 cm 2. 8.1 mm = 0.0081 m 8.2 mm = 0.0000082 km 7.5 cm = 75 mm 5. 6.3 cm = 0.063 m 6. 3.3 cm = 0.000033 km 7. 3.6 m = 0.0036 km 8. 5.2 pm = 0.000 000 0052 mm 9. 7.2 μm = 0.00072 cm 10. 1.2 km = 12,000,000,000,000 nm 11. 1.7 km = 170,000 cm

  26. Ch3.3 Velocity and Acceleration Velocity – speed in a specific direction

  27. Ch3.3 Velocity and Acceleration Velocity – speed in a specific direction Average velocity – since speed can vary in most cases, use average speed. - easiest method is finding total distance divided by total time

  28. Ch3.3 Velocity and Acceleration Velocity – speed in a specific direction Average velocity – since speed can vary in most cases, use average speed. - easiest method is finding total distance divided by total time

  29. Ch3.3 Velocity and Acceleration Velocity – speed in a specific direction Average velocity – since speed can vary in most cases, use average speed. - easiest method is finding total distance divided by total time Instantaneous velocity – speed and direction at that moment (GPS and speedometer in your car)

  30. Ch3.3 Velocity and Acceleration Velocity – speed in a specific direction Average velocity – since speed can vary in most cases, use average speed. - easiest method is finding total distance divided by total time Instantaneous velocity – speed and direction at that moment (GPS and speedometer in your car) Ex1) Standing on a roof 100m above the ground, a kid drops a water balloon 4.5s it hits the ground. What was the average speed?

  31. Ex2) Hair grows at an average rate of 3x10-9 m/s. Find the length after one year.

  32. Ex2) Hair grows at an average rate of 3x10-9 m/s. Find the length after one year. d = v.t = (3x10-9m/s)(3.2x107s) = 0.09m (9 cm) What if the hair was already 10cm long before the year started, how long would it be a year later?

  33. To find distance when not starting at zero: df = di + v.t Ex3) A car passes a sign that reads 213.8km. If the cruise control is set at 88km/hr, what does a sign read ½ hour later?

  34. Acceleration – a measure of the change in velocity speeding up: a = (+) slowing down: a = (–) Ex4) Set up only: A driver traveling at 25m/s slows at a constant rate of 8.5m/s2. What is the total distance the car moves before stopping? Ch3 HW#2 4 – 8

  35. Lab3.1 – Motion - due tomorrow - go over Ch3 HW#2 @ beginning of period

  36. Ch3 HW#2 4 – 8 (Set up, no solve, except 8) 4. A dragster starting from rest accelerates at 49 m/s2. How fast is it going when it has traveled 325m? 5. The same dragster reaches the end of the drag strip rolling at 100km/hr, when it opens its parachute. It rolls to a stop in 150m. How much time does it take to come to a stop?

  37. 6. A ball is thrown upward at 25m/s. Gravity slows it at 10m/s2. What height does it reach? 7. A ball is hit and then slowly comes to a stop in 5 sec. Draw. When is it going fastest? What is its final speed? Is its accl +/-?

  38. 8. Solve: Enter a toll road at 1pm. After traveling 55km, the ticket is stamped 2:30pm. What was the average speed. At any time could it have been going faster than the average? Why speed not velocity?

  39. Ch 4 - Vectors Have magnitude (length) and point in a direction

  40. Ch 4 - Vectors Have magnitude (length) and point in a direction Ex1) Draw vectors representing velocities: 15 m/s North 10 m/s East

  41. Vectors can be added together, called vector addition

  42. Vectors can be added together, called vector addition - Graphically, place them head to tail

  43. Vectors can be added together, called vector addition - Graphically, place them head to tail - Mathematically, vector addition means 3 possibilities:

  44. Vectors can be added together, called vector addition - Graphically, place them head to tail - Mathematically, vector addition means 3 possibilities: 1. Point same direction: Add 2. Point opposite directions: Subtract 3. Point perpendicular: Pythag

  45. Ex2) Vector Addition: a) 2 km east and 1 km east b) 3 km east and 2 km west c) 3 km north and 4 km east

  46. Ex2) Vector Addition: a) 2 km east and 1 km east (Red is the resultant vector) b) 3 km east and 2 km west (Red is the resultant vector) c) 3 km north and 4 km east (Red is the resultant vector) --The order you add vectors doesn’t matter 2km 1km 2 + 1 = 3 km 3km 1km 2km 3 – 2 = 1 4km 3km 5 km

  47. HW#2) A shopper walks from the door of the mall to her car 250 m down • a lane of cars, then turns 90° to the right and walks an additional 60 m. • What is themagnitude of thedisplacement of her car from the mall door?

  48. HW#2) A shopper walks from the door of the mall to her car 250 m down • a lane of cars, then turns 90° to the right and walks an additional 60 m. • What is the magnitude of the displacement of her car from the mall door? 60 d = √ 250 2502+602 = 257m Mall

  49. 3. A boat is rowed South at 3 m/s down a river that flows South at 5 m/s. What speed does an observer from shore see the boat moving? -A boat is rowed North at 3 m/s up a river that flows South at 5 m/s. What speed does an observer from shore see the boat moving? -A boat is rowed East at 3 m/s across a river that flows South at 5 m/s. What speed does an observer from shore see the boat moving?

  50. 3. A boat is rowed South at 3 m/s down a river that flows South at 5 m/s. What speed does an observer from shore see the boat moving? -A boat is rowed North at 3 m/s up a river that flows South at 5 m/s. What speed does an observer from shore see the boat moving? -A boat is rowed East at 3 m/s across a river that flows South at 5 m/s. What speed does an observer from shore see the boat moving? 3m/s 8m/s 5m/a

More Related