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Student Objective Click below for today’s topic & warmup http://ifaketext.com/img/odh53nmk.jpg

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Interpret speed graphs WARM-UP Student Objective What is the difference between speed and velocity? Speed is how fast an object travels Velocity is how fast an object travels in a certain direction.

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Speed Graph Time

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Describe the motion of the car in graph #1 and graph #2. #1 #2

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Name: _________________ Class: __________________ An upward slope tells us an object is moving ___________ A downward slope tells us the object is moving ___________ A straight line tells us an object is moving at _________ ________ A not straight line tells us an object is _____________ The horizontal line in the middle here tells us the object __________ This object is moving away and ___________ _____. This object is moving ____________ and ____________ _____ This object is moving closer and _________ ________ The direction the line is heading determines whether an object is coming closer or moving away. The slope of the line tells you how fast the object is moving (steeper = faster). A curved line indicates acceleration or deceleration.

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Name: _________________ Class: __________________ An upward slope tells us an object is moving ___________ A downward slope tells us the object is moving ___________ A straight line tells us an object is moving at _________ ________ A not straight line tells us an object is _____________ The horizontal line in the middle here tells us the object __________ This object is moving away and ___________ _____. This object is moving ____________ and ____________ _____ This object is moving closer and _________ ________ The direction the line is heading determines whether an object is coming closer or moving away. The slope of the line tells you how fast the object is moving (steeper = faster). A curved line indicates acceleration or deceleration. steady speed changing speed speeding up away closer speeding not moving up closer slowing down

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3. The price of a certain CD varied over a period of time. It started high and remained the same for a period of time. Then it had a steady decrease until it reached an all time low, where it stayed the same for a period of time. In the end, the stock rose fast to a moderate price, where it remained for the remaining time. 2. The post office charges $.41 for any mail up to an ounce in weight. After that the charge is $.23 for each additional ounce or part of an ounce. For instance, if it weights 1.1 ounces or 1.9 ounces, it will cost the same, $.64. 1. Jeffery left his home headed toward the school. He started out at a steady moderate pace until he got to a red light. While stopped at the light, he realized that he had forgotten his math homework. He turned around and headed back home at a faster pace. Then he drove to school at a fast pace without stopping on the way. Circle the graph that best matches each scenario below.

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3. The price of a certain CD varied over a period of time. It started high and remained the same for a period of time. Then it had a steady decrease until it reached an all time low, where it stayed the same for a period of time. In the end, the stock rose fast to a moderate price, where it remained for the remaining time. 2. The post office charges $.41 for any mail up to an ounce in weight. After that the charge is $.23 for each additional ounce or part of an ounce. For instance, if it weights 1.1 ounces or 1.9 ounces, it will cost the same, $.64. 1. Jeffery left his home headed toward the school. He started out at a steady moderate pace until he got to a red light. While stopped at the light, he realized that he had forgotten his math homework. He turned around and headed back home at a faster pace. Then he drove to school at a fast pace without stopping on the way. Circle the graph that best matches each scenario below.

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How would you describe the motion of these cars? Are they accelerating, decelerating, or moving at a constant speed? Which distance-time graph represents each car?

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- Describing and Measuring Motion Calculating Speed If you know the distance an object travels in a certain amount of time, you can calculate the speed of the object. Speed = distance ÷ time

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Calculate the speed of each animal after one minute (60 sec.) has elapsed. RabbitSpeed = D/T Speed = 1000m / 60sec Speed is _______ TortoiseSpeed = D/T Speed = ______m / 60sec Speed is _______ CheetahSpeed = D/T Speed = ______m / ____sec Speed is _______ 4 200060 16.67 m/s 0.07 m/s 33.33 m/s

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Calculate each snowmobile’s speed and predict the winner. Then race them to see if you were right! http://sunshine.chpc.utah.edu/Labs/ForceAndMotion/act1/lab.ht m

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How Fast Can You Get Your Shuttle to the Spaceship? You will now complete a online graphing activity to see how fast you can race through space to the mother ship!! Can you make it in time? Spend 5 minutes trying to make the trip to the mother ship as fast as you can Read the directions carefully and away you go! Answer the questions on your worksheet. Distance Time Graph Activity 13

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Answer the following question on your notebook paper. (Distance in miles, time in hours) 1.How many miles away was the shuttle from the spaceship at the beginning of the trip? 2.How far away was your shuttle from the spaceship 10 hours into the trip? 3.How far away was your shuttle from the spaceship 20 hours into the trip? 4.How far away was your shuttle from the spaceship 25 hours into the trip? 5.Where in your trip were you traveling the fastest? How do you know?? 6.Where in the trip were you traveling the slowest? How do you know?? How Fast Can You Get Your Shuttle to the Spaceship?

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Extension How did the various objects in space affect the speed of your shuttle? Do you think you were traveling at a constant speed in your shuttle? Why or why not? Be prepared to share your responses with the class. 15

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Conclusion: Which animal is the has the fastest speed? Animal A. 10 miles in 2 hours B. 50 miles in 25 hours C. 15 miles in 5 hours

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