1. LESSON LESSON INTRODUCTION Get Ready Before you begin, decide if you agree or disagree with each of these statements. As you view this presentation, see if you change your mind about any of the statements. What do you think? 3 Newton's Second Law

2. Get Ready LESSON LESSON INTRODUCTION Do you agree or disagree? When an object’s speed increases, the object accelerates. If an object’s mass increases, its acceleration also increases if the net force acting on the object stays the same. 3 Newton's Second Law

3. Key Concepts/Essential Questions LESSON LESSON INTRODUCTION 3 Newton's Second Law What is Newton’s second law of motion? How does centripetal force affect circular motion?

4. Vocabulary Watch out for these words! LESSON LESSON INTRODUCTION Newton’s second law of motion circular motion centripetal force 3 Newton's Second Law

5. LESSON LESSON INTRODUCTION 3 Newton's Second Law What makes it go? Look at the photo at the beginning of the lesson. The archer pulls back the string and takes aim. When she releases the string, the arrow soars through the air. To reach the target, the arrow must quickly reach a high speed. How is it able to move so fast? The force from the string determines the arrow’s speed.

6. LESSON 3 Newton's Second Law

7. Lesson Review LESSON LESSON WRAP-UP Do you agree or disagree? When an object’s speed increases, the object accelerates. 3 Newton's Second Law Agree. An object accelerates when it experiences a change in speed, direction, or both.

8. Lesson Review LESSON LESSON WRAP-UP Do you agree or disagree? If an object’s mass increases, its acceleration also increases if the net force acting on the object stays the same. 3 Newton's Second Law Disagree. Assuming the net force on an object is constant, if the mass of the object increases, its acceleration decreases.

9. Key Concept/Essential Question Review LESSON LESSON WRAP-UP What is Newton’s second law of motion? 3 Newton's Second Law According to Newton’s second law of motion, an object’s acceleration is the net force on the object divided by its mass.

10. Key Concept/Essential Question Review LESSON LESSON WRAP-UP How does centripetal force affect circular motion? 3 Newton's Second Law In circular motion, a centripetal force pulls an object toward the center of the curve.