Vector scalarquantitiesppt
- 1. Bellwork: Page 464 #6 Set up for Cornell Notes
- 2. Assignment: Vector - Scalar Cornell Notes SC.912.P.12.1 Distinguish between scalar and vector quantiti Scale 4: Extra Credit Extension: Design an experiment using an everyday physical activity that will provide data, develop graphs to analyze vector and scalar quantities (One page with data chart and graph. 5-points) 3: I can describe the differences between vectors and scalars and when to use them. 2: I can describe the differences between vectors and scalars 1: I can define vectors and scalars with help from the textbook.
- 3. Vector & Scalar Quantities https://www.youtube.com/watch?v=ihNZlp7iUHE
- 4. What is a Scalar Quantity? Only has magnitude Requires 2 things: 1. A value 2. Appropriate units
- 5. What is a Vector Quantity? Has magnitude (size, amount) & direction Requires 3 things: 1. A value 2. Appropriate units 3. A direction!
- 6. Exit Slip: On index card, write your name. Draw the t-chart and sort the measurements using your chart Scalar Vectors 30 mph 30 mph 50o C50o C120 lbs 120 lbs 5 Blocks East 5 Blocks East Falls 5 degrees Falls 5 degrees 2.5 m/s North 2.5 m/s North 3pm3pm
- 8. More about Vectors A vector is represented on paper by an arrow 1. the length represents magnitude 2. the arrow faces the direction of motion 3. a vector can be “picked up” and moved on the paper as long as the length and direction its pointing does not change
- 9. Graphical Representation of a Vector The goal is to draw a mini version of the vectors to give you an accurate picture of the magnitude and direction. To do so, you must: 1. Pick a scale to represent the vectors. Make it simple yet appropriate. 2. Draw the tip of the vector as an arrow pointing in the appropriate direction. 3. Use a ruler & protractor to draw arrows for accuracy. The angle is always measured from the horizontal or vertical.
- 10. Understanding Vector Directions To accurately draw a given vector, start at the second direction and move the given degrees to the first direction. N S EW 30° N of E Start on the East origin and turn 30° to the North
- 11. Graphical Representation Practice 5.0 m/s East (suggested scale: 1 cm = 1 m/s) 300 Newtons 60° South of East (suggested scale: 1 cm = 100 N) 0.40 m 25° East of North (suggested scale: 5 cm = 0.1 m)
- 12. Graphical Addition of Vectors (cont.) 5 Km 3 Km Scale: 1 Km = 1 cm Resultant Vector (red) = 6 cm, therefore its 6 km.
- 13. Vector Addition Example #1 Use a graphical representation to solve the following: A hiker walks 1 km west, then 2 km south, then 3 km west. What is the sum of his distance traveled using a graphical representation?
- 14. Vector Addition Example #1 (cont.) Answer = ????????
- 15. Vector Addition Example #2 Use a graphical representation to solve the following: Another hiker walks 2 km south and 4 km west. What is the sum of her distance traveled using a graphical representation? How does it compare to hiker #1?
- 16. Vector Addition Example #2 (cont.) Answer = ????????
- 17. Assignment: Vector - Scalar Cornell Notes SC.912.P.12.1 Distinguish between scalar and vector quantiti Scale 4: Extra Credit Extension: Design an experiment using an everyday physical activity that will provide data, develop graphs to analyze vector and scalar quantities (One page with data chart and graph. 5-points) 3: I can describe the differences between vectors and scalars and when to use them. 2: I can describe the differences between vectors and scalars 1: I can define vectors and scalars with help from the textbook.
- 18. Read Page 473
- 19. Acceleration Speed is the rate of change of position. Acceleration is the rate of change of velocity. What form of measurement is acceleration, scalar or vector? Hint:
- 20. Acceleration • Acceleration is a vector which measures the change in the velocity of an object. • It has magnitude and direction. • This means acceleration could be any of the following three… 1. a change in speed, the magnitude of the velocity (from 34 km/h to 67 km/h) 2. a change in direction (from East to North- East) 3. a change in both speed and direction (from 34km/h East to 12 km/h West)
- 23. Acceleration Formula Acceleration = Velocityf – Velocityi Time
- 24. Negative Acceleration In physics, acceleration is not always an increase in velocity. It can also be a decrease in velocity. Even though you might have heard people use the word deceleration to describe an object slowing down, this isn’t really proper physics.
- 25. Negative Acceleration • We usually visualize speeding up as positive, and slowing down as negative. • A positive velocity means it’s going in the positive direction (like forwards), and a negative direction is backwards.
- 26. Practice: Physics to go Page 128 #3-6