Forces 11.1 Forces change motion. 11.2 CHAPTER NEW CHAPTER Forces the BIG idea Forces change the motion of objects in predictable ways. 11.1 Forces change motion. 11.2 Force and mass determine acceleration. 11.3 Forces act in pairs. 11.4 Forces transfer momentum. CHAPTER OUTLINE CHAPTER RESOURCES

11.1 Forces change motion. Newton's first law Objects at rest remain at rest, and objects in motion remain in motion with the same velocity, unless acted upon by an unbalanced force. force net force Newton's first law inertia CHAPTER RESOURCES SECTION OUTLINE

11.1 Forces change motion. Newton's first law Objects at rest remain at rest, and objects in motion remain in motion with the same velocity, unless acted upon by an unbalanced force. force net force Newton's first law inertia CHAPTER RESOURCES SECTION OUTLINE

11.1 Forces change motion. Newton's first law Objects at rest remain at rest, and objects in motion remain in motion with the same velocity, unless acted upon by an unbalanced force. force net force Newton's first law inertia SIMULATION Change the sizes and directions of forces on an object and predict how it will move. CHAPTER RESOURCES SECTION OUTLINE

11.1 force Forces change motion. net force Newton's first law A push or a pull; something that changes the motion of an object. inertia CHAPTER RESOURCES KEY CONCEPT SUMMARY

11.1 net force Forces change motion. Newton's first law The overall force acting on an object when all of the forces acting on it are combined. inertia CHAPTER RESOURCES KEY CONCEPT SUMMARY

11.1 Newton's first law Forces change motion. net force Newton's first law A scientific law stating that objects at rest remain at rest, and objects in motion remain in motion with the same velocity, unless acted on by an unbalanced force. inertia CHAPTER RESOURCES KEY CONCEPT SUMMARY

11.1 inertia Forces change motion. net force Newton's first law The resistance of an object to a change in the speed or the direction of its motion. inertia CHAPTER RESOURCES KEY CONCEPT SUMMARY

Force and mass determine acceleration. 11.2 Force and mass determine acceleration. Newton's second law The acceleration of an object increases with increased force and decreases with increased mass, and is in the same direction as the force. Newton's second law centripetal force larger force small force same mass, larger force = increased acceleration CHAPTER RESOURCES SECTION OUTLINE

Force and mass determine acceleration. 11.2 Force and mass determine acceleration. Newton's second law The acceleration of an object increases with increased force and decreases with increased mass, and is in the same direction as the force. Newton's second law centripetal force larger mass small mass larger mass, same force = decreased acceleration CHAPTER RESOURCES SECTION OUTLINE

Force and mass determine acceleration. 11.2 Force and mass determine acceleration. Newton's second law The acceleration of an object increases with increased force and decreases with increased mass, and is in the same direction as the force. Newton's second law centripetal force SIMULATION Explore Newton’s second law. CHAPTER RESOURCES SECTION OUTLINE

11.2 Newton's second law Force and mass determine acceleration. centripetal force A scientific law stating that the acceleration of an object increases with increased force and decreases with increased mass. CHAPTER RESOURCES KEY CONCEPT SUMMARY

11.2 centripetal force Force and mass determine acceleration. Newton's second law centripetal force centripetal force Any force that keeps an object moving in a circle. CHAPTER RESOURCES KEY CONCEPT SUMMARY

11.3 Forces act in pairs. Newton's third law When one object exerts a force on another object, the second object exerts an equal and opposite force on the first object. Newton's third law CHAPTER RESOURCES SECTION OUTLINE

11.3 Forces act in pairs. Newton's third law When one object exerts a force on another object, the second object exerts an equal and opposite force on the first object. Newton's third law CHAPTER RESOURCES SECTION OUTLINE

11.3 Newton's third law Forces act in pairs. A scientific law stating that every time one object exerts a force on another object, the second object exerts a force that is equal in size and opposite in direction back on the first object. CHAPTER RESOURCES KEY CONCEPT SUMMARY

Forces transfer momentum. 11.4 Forces transfer momentum. • Momentum is a property of a moving object. momentum collision conservation of momentum momentum CHAPTER RESOURCES SECTION OUTLINE

Forces transfer momentum. 11.4 Forces transfer momentum. • Momentum is a property of a moving object. momentum • Forces in collisions are equal and opposite. collision conservation of momentum momentum 1 momentum 2 total momentum forces in collision CHAPTER RESOURCES SECTION OUTLINE

Forces transfer momentum. 11.4 Forces transfer momentum. • Momentum is a property of a moving object. momentum • Forces in collisions are equal and opposite. collision • Momentum is conserved in collisions. conservation of momentum momentum 1 momentum 2 total momentum CHAPTER RESOURCES SECTION OUTLINE

11.4 momentum Forces transfer momentum. collision conservation of momentum A measure of mass in motion; the momentum of an object is the product of its mass and velocity. CHAPTER RESOURCES KEY CONCEPT SUMMARY

11.4 collision Forces transfer momentum. conservation of momentum A situation in which two objects in close contact exchange energy and momentum. CHAPTER RESOURCES KEY CONCEPT SUMMARY

conservation of momentum 11.4 Forces transfer momentum. momentum conservation of momentum collision conservation of momentum A law stating that the amount of momentum a system of objects has does not change as long as there are no outside forces acting on that system. CHAPTER RESOURCES KEY CONCEPT SUMMARY

11.1 Forces change motion. I. Forces change motion. A. A force is a push or a pull. net force 1. Types of Forces Newton's first law 2. Size and Direction of Forces inertia 3. Balanced and Unbalanced Forces 4. Forces on Moving Objects B. Newton’s first law relates force and motion. 1. Galileo’s Thought Experiment 2. Newton’s First Law CHAPTER RESOURCES 3. Inertia KEY CONCEPT SUMMARY

Force and mass determine acceleration. 11.2 Force and mass determine acceleration. II. Force and mass determine acceleration. Newton's second law A. Newton’s second law relates force, mass, and acceleration. centripetal force 1. Newton’s Second Law 2. Force Equals Mass Times Acceleration 3. Mass and Acceleration B. Forces can change the direction of motion. 1. Centripetal Force 2. Circular Motion and Newton’s Second Law CHAPTER RESOURCES KEY CONCEPT SUMMARY

11.3 Forces act in pairs. III. Forces act in pairs. Newton's third law A. Newton’s third law relates action and reaction forces. 1. Action and Reaction Pairs 2. Action and Reaction Forces Versus Balanced Forces B. Newton’s three laws describe and predict motion. CHAPTER RESOURCES KEY CONCEPT SUMMARY

Forces transfer momentum. 11.4 Forces transfer momentum. IV. Forces transfer momentum. momentum A. Objects in motion have momentum. collision B. Momentum can be transferred from one object to another. conservation of momentum C. Momentum is conserved. 1. Two Types of Collisions 2. Momentum and Newton’s Third Law CHAPTER RESOURCES KEY CONCEPT SUMMARY

Image Gallery Click on the icons to see a larger image or animation. CHAPTER HOME Image Gallery Click on the icons to see a larger image or animation. SIMULATION Change the sizes and directions of forces on an object and predict how it will move. SIMULATION Explore Newton’s second law.

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