IMG_0117.jpeg

# Unit Topic: Motion and Force ## Essential Question: How do forces cause changes in an object's speed and direction of motion? ### Concept 1: Describing Motion **Objectives:** * Describe the motion of objects depicted in graphs. * Analyze and explain distance vs. time graphs. **Vocabulary:**...

# Unit Topic: Motion and Force ## Essential Question: How do forces cause changes in an object's speed and direction of motion? ### Concept 1: Describing Motion **Objectives:** * Describe the motion of objects depicted in graphs. * Analyze and explain distance vs. time graphs. **Vocabulary:** * Motion * Reference point * Distance * Displacement * Speed * Average speed * Instantaneous speed * Velocity **Practice:** 1. The cross-country team runs 10 miles. Find the distance and displacement of the runners. 2. A family travels 110 km east, then 45 km west. Find the distance and displacement of the family. 3. A car drives 215 km west and then 85 km south. Find the distance and displacement of the car. 4. If you ran 3.1 miles in 0.5 hours, what was your speed? 5. Sound travels at 330 m/s. If a lightning bolt strikes 5 m away, how long will it take for the sound to reach you? 6. A man drives south 55 miles in 0.75 hours. What is his average velocity? 7. Sketch the following distance vs. time graphs: * a. An object not moving * b. An object moving at a constant speed * c. An object speeding up * d. An object slowing down ### Concept 2: Acceleration **Objectives:** * Analyze and explain velocity vs. time graphs. **Vocabulary:** * Acceleration *...**(other vocabulary words, too truncated to extract)** **Practice:** 8. List the different ways an object can accelerate. 9. An airplane reaches 80 m/s in 20 s. What is its acceleration? 10. A puppy running 11.2 m/s stops in 2 seconds. What is its acceleration? 11. Explain what the slopes on a distance vs. time graph and velocity vs. time graph tell you. 12. Sketch the following velocity vs. time graphs: * a. An object not moving * b. An object moving at a constant speed * c. An object speeding up * d. An object slowing down ### Concept 3: Newton's Laws **Objectives:** * Rank objects based on amount of inertia. * Rank objects based on amount of momentum. * Given a scenario, identify and explain which law is at work. * Find net force on an object based on a picture or diagram. * Calculate weight of an object, given its mass. **Vocabulary:** * Force * Net force * Inertia * Friction * Air resistance * Law of Universal Gravitation * Weight * Law of Conservation of Momentum **Practice:** 13. Explain the difference between balanced and unbalanced forces. 14. Differentiate between the factors that affect inertia and momentum. 15. Explain each of Newton's Laws and give an example of each. 16. Explain the difference between the three types of friction. 17. Sketch and label a picture of a sky diver to explain terminal velocity. 18. A 15.5 kg box accelerates at 24.2 m/s². What was the net force applied to the box? 19. Given a force of 56 N and an acceleration of 7 m/s², what is the object's mass? 20. If a truck has a mass of 100 kg and a velocity of 35 m/s, what is its momentum? **(Note: Some vocabulary terms are truncated and incomplete in the image.)**