Starter  What is frame of reference?  Give two examples of a frame of reference.  Give an example of displacement. 1

Day 6 SPEED AND VELOCITY 2

EQ: What factors determine Motion? LT: I can… 4) explain the difference between speed and velocity. 5) compare and contrast velocity and acceleration. 6) analyze distance vs. time graphs. 7) analyze velocity vs. time graphs. 3

Position, Velocity, Acceleration Video  3b8f-5fe c- 70f83023bd5c/science-nfl-football- kinematics 3b8f-5fe c- 70f83023bd5c/science-nfl-football- kinematics 4

Speed Reading Passage 1. What is the main idea of the passage? 2. What three measurements are mentioned in the passage? 3. What is speed? 4. Speed is the ___________ at which the distance an object moves changes compared to time. 5. If you change your rate by getting faster you are ________________ your speed. 6. What two measurements measures speed? 7. What is the formula for calculating speed? 8. What are two units to describe speed? 5

Explain: Speed Speed is a measure of how fast an object is moving or traveling. Formula: s= d / t VariableUnits s – speedm / s, m / min, km / h d – distancem, km, cm t – timesec or s, min, h 6

Explain: Speed s = d / t d = s X t t = d / s s d t 7

Practice Problems  Directions: Use a KWFL Chart to solve the word problem. If a frog jumps a distance of 3 meters in 6 seconds, what is its speed? 8

Practice  Directions: Use a KWFL Chart to solve the word problem. A runner completed the 100-meter dash in 10.0 seconds. Her average speed is? 9

Speed: Group KWFL  Directions: Using the word problem, complete a KWFL.  While traveling on vacation, you measure the times and distances traveled. You travel 25 kilometers in 5 hours, followed by 25 kilometers in 5 hours. What is the average speed? 10

Practice Problems: Speed Directions: In your notebook Draw a KWFL Chart to solve the following word problems. 1. What is the speed of a car that travels 180 km in 1.5 hours? 2. What is the average speed of a dog cart that travels 2 kilometer in the first 30 min., 0.5 kilometer in the next hour and 3 kilometer in 30 min.? 11

3. If a car has a constant speed traveling 80 meters/hour in 5.5 hours, how far is the car traveling? 4. If you walk at a constant speed traveling 2 kilometer/second in 0.5 kilometers, how long will it take to you walk? 5. If a lion runs 40 kilometers in 120 min, how fast will he travel? 12

Elaborate: Classify Directions: In your notebook, draw the following table. DistanceTimeSpeed 13

Classify Directions: Sort the following units under the correct heading in your table. cmm/sskm cm/hrhmcsms km/sdm/hr hsmmhm/ms km/cs mhr 14

Elaborate: Speed: Group KWFL  Directions: On a poster paper draw a KWFL chart, complete your KWFL using the word problems your teacher gives you. Steps 1. Half you poster paper into two sections. 2. Draw the KWFL chart on the top half. 3. Draw the KWFL chart on the bottom half. 4. Fill in the KWFL for each word problem your teacher gave you. 15

Elaborate: Practice Problems: Speed  Directions: Use a KWFL to complete. 1. Mark takes a 45 minute bike ride through the canyon a total of 4 kilometers. What is his speed? 2. A bug crawls 2 meters at a constant speed of 100 meters/second. How long will it take the bug to crawl? 3. A bird flies 100 meters/second in 50 seconds. How far will the birds travel? 16

Explain: Reading Passage: Speed vs. Velocity Directions: Use the Reading Passage Speed vs. Velocity to complete your T-chart. Make sure to have the following information in your T-chart. Speed Velocity Definition Formula Triangle Unit 17

Explain: Scalar vs. Vector Write the following information under your NOTES T-chart for Speed vs. Velocity ScalarVector Magnitude is a number. Speed and distance are scalar. Displacement and velocity are vectors. They are not scalar. 18

Explore: Classify As Velocity or Speed And Scalar or Vector 1. 2 m/s north 2. 3 km/hr 3. 8 cm/s m/s north 5. 8,000 km/ hr south miles/hours 7. 3,000 meters/second 19

Explain: Vectors Directions: Draw the following vector and label it. Write the explanation under your drawing. A vector is represented as a ray. The longer the ray the more magnitude you have. The shorter the ray the less magnitude you have. 20

Vectors a. b. c. Directions: Step1 Draw the following vectors. Step 2 In a paragraph answer the following questions in complete sentences. 1.Rank the following vectors from least to greatest. 2.Identify the direction for each vector (North, South, East, West) 3.Explain the similarities and differences between the vectors. 21

Explain: Adding and Subtracting Vectors 22

Elaborate-Vectors Directions: Would you subtract or add the following vectors according to their direction. a. b. c. d. e. 23

Elaborate: Practice Problem: Velocity Directions: Identify what you know, the formula, and calculate the velocity. 1. What is the average velocity of a car that traveled a distance of 50 km north in 2 hrs? 2. What is the velocity of jet that traveled 25,000 meters east from New York to Milan, Italy in 12 hours? 3. How long will it take a dump truck with a 5,000 ton load traveling 2,000 km east with a constant velocity of 10,000 km/hr? 24

Exit Slip  Directions: Identify what you know “K” and what you are solving for “W” using the following word problem.  A spider crawls on a wall. First it crawls 1 meter up, then 1 meter to the left, and 1 meter down in 3 minutes. How fast does the spider crawl? 25