Newton’s Third Law. Newton’s Third Law of Motion Whenever one object exerts a force on a second...

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Newton’s Third Law

Transcript of Newton’s Third Law. Newton’s Third Law of Motion Whenever one object exerts a force on a second...

Page 1: Newton’s Third Law. Newton’s Third Law of Motion Whenever one object exerts a force on a second object, the second object exerts an equal and opposite.

Newton’s Third Law

Page 2: Newton’s Third Law. Newton’s Third Law of Motion Whenever one object exerts a force on a second object, the second object exerts an equal and opposite.

Newton’s Third Law of Motion

• Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.

• “To every action there is an equal and opposite reaction”

• F(AB) = - F(BA)• Forces come in pairs. In nature there is no

single force (all by itself).

Page 3: Newton’s Third Law. Newton’s Third Law of Motion Whenever one object exerts a force on a second object, the second object exerts an equal and opposite.

Examples

• I exert a force on a desk with my foot and the desk exerts a force back on my foot. (“I kick a desk and the desk kicks me back.”)

• A hammer exerts a force on a nail and the nail exerts a force back on the hammer.

Page 4: Newton’s Third Law. Newton’s Third Law of Motion Whenever one object exerts a force on a second object, the second object exerts an equal and opposite.

Force “on” and “by”

• A force influences the motion of an object only when it is applied on that object. A force exerted by a body does not influence that body (itself); it only influences the OTHER body on which it is exerted.

• F(AB) = - F(BA)

Page 5: Newton’s Third Law. Newton’s Third Law of Motion Whenever one object exerts a force on a second object, the second object exerts an equal and opposite.

Group Activity

• 1. Explain walking forward on East Bottom.• 2. Explain birds flying south.• 3. Explain a rocket lifting off Cape Canaveral.• 4. A person throws a package out of a boat

(initially at rest).• 5. A bat exerts a 50 N force on a baseball.• 6. An inflated, but untied, balloon flies off.• 7. Earth exerts gravitation on the moon.


PHY2053, Lecture 8: Applying Newton’s Laws · 2013-09-23 · PHY2053, Lecture 8: Applying Newton’s Laws Applying Newton’s Laws Book-Proposed Strategy: Decide which object will

PHY2053, Lecture 8: Applying Newton’s Laws · 2013-09-23 · PHY2053, Lecture 8: Applying Newton’s Laws Applying Newton’s Laws Book-Proposed Strategy: Decide which object will

Newton’s ______ Law: In plain words: For every_____________, there is an equal and opposite____________. In physics speak: If object A exerts a __________.

Newton’s ______ Law: In plain words: For every_____________, there is an equal and opposite____________. In physics speak: If object A exerts a __________.

For every action….. Action and Reaction Newton’s third law describes something else that happens when one object exerts a force on another object. 3.

For every action….. Action and Reaction Newton’s third law describes something else that happens when one object exerts a force on another object. 3.

Newton’s Laws Review Chapters 3 and 4. Question 1 Which of Newton’s Laws says that “a net force acting on an object causes the object to accelerate in.

Newton’s Laws Review Chapters 3 and 4. Question 1 Which of Newton’s Laws says that “a net force acting on an object causes the object to accelerate in.

What is Newton’s Third Law Describes what happens when one object exerts a force on another object. Forces always act in equal but opposite pairs.

What is Newton’s Third Law Describes what happens when one object exerts a force on another object. Forces always act in equal but opposite pairs.

Lesson 2. Newton’s Second Law Newton’s Second Law Newton’s Second Law of Motion The acceleration of an object is directly proportional to the net force.

Lesson 2. Newton’s Second Law Newton’s Second Law Newton’s Second Law of Motion The acceleration of an object is directly proportional to the net force.

Chapter 7. Newton’s Third Law...B. A exerts a force on B but B doesn’t exert a force on A. C. B exerts a force on A but A doesn’t exert a force on B. D. B exerts a larger force

Chapter 7. Newton’s Third Law...B. A exerts a force on B but B doesn’t exert a force on A. C. B exerts a force on A but A doesn’t exert a force on B. D. B exerts a larger force

Newton’s first law of motion states that the motion of an object changes only if an unbalanced force acts on the object. Newton’s second law of motion.

Newton’s first law of motion states that the motion of an object changes only if an unbalanced force acts on the object. Newton’s second law of motion.

Concept of Force and Newton’s Laws of Motionweb.mit.edu/8.01t/www/materials/Presentations/...Newton’s Second Law: Strategy Treat each object in the system as a point-like object

Concept of Force and Newton’s Laws of Motionweb.mit.edu/8.01t/www/materials/Presentations/...Newton’s Second Law: Strategy Treat each object in the system as a point-like object

Unit B, Chapter 4,Lesson 5. Action and Reaction Newton’s third law states that when one object exerts a force on another object, the second object exerts.

Unit B, Chapter 4,Lesson 5. Action and Reaction Newton’s third law states that when one object exerts a force on another object, the second object exerts.

Newton’s Laws of Motion - SFSU Physics & Astronomyjfielder/11504week5notes.pdf · Newton’s Laws of Motion #3: When one body exerts a force on a second body, the second body exerts

Newton’s Laws of Motion - SFSU Physics & Astronomyjfielder/11504week5notes.pdf · Newton’s Laws of Motion #3: When one body exerts a force on a second body, the second body exerts

12.3 Newton’s Third Law of Motion and Momentum Newton’s Third Law Whenever one object exerts a force on a second object, the second object exerts an equal.

12.3 Newton’s Third Law of Motion and Momentum Newton’s Third Law Whenever one object exerts a force on a second object, the second object exerts an equal.

Whenever one object exerts a force on a second object the second object exerts a force equal in strength, BUT opposite in direction back on the first object.

Whenever one object exerts a force on a second object the second object exerts a force equal in strength, BUT opposite in direction back on the first object.

1 Honors Physics Review 2 Chapter 4 - 7. 2 Newton’s Three Laws of Motion 3 rd :When one object exerts a force on a second object, the second object also.

1 Honors Physics Review 2 Chapter 4 - 7. 2 Newton’s Three Laws of Motion 3 rd :When one object exerts a force on a second object, the second object also.

11.3 Newton’s 3rd Law I can: -I can apply Newton’s Laws using multiple forces on a single object.

11.3 Newton’s 3rd Law I can: -I can apply Newton’s Laws using multiple forces on a single object.

Newton’s Laws of Motion Newton’s First Law of Motion: An object at rest remains at rest and an object in motion remains in motion at constant speed and.

Newton’s Laws of Motion Newton’s First Law of Motion: An object at rest remains at rest and an object in motion remains in motion at constant speed and.

Newton’s 3 rd Law and Momentum. Newton’s 3 rd Law When one object exerts a force on a second object, the second object exerts a force on the first that.

Newton’s 3 rd Law and Momentum. Newton’s 3 rd Law When one object exerts a force on a second object, the second object exerts a force on the first that.

Newton’s 3rd Lawkaolaz.org/home/AZ088620204/middle/teachers/8th...• Newton’s third law describes something else that happens when one object exerts a force on another object.

Newton’s 3rd Lawkaolaz.org/home/AZ088620204/middle/teachers/8th...• Newton’s third law describes something else that happens when one object exerts a force on another object.

Newton’s Third of Motion Newton’s Third Law Action-Reaction Whenever one body exerts a force on a second body… …the second body exerts an equal and opposite.

Newton’s Third of Motion Newton’s Third Law Action-Reaction Whenever one body exerts a force on a second body… …the second body exerts an equal and opposite.

Newton’s 3 rd Law Action and Reaction. Force Pairs A force is always applied by a secondary object The object to which the force is applied also exerts.

Newton’s 3 rd Law Action and Reaction. Force Pairs A force is always applied by a secondary object The object to which the force is applied also exerts.