CCEEMario Mendoza1 Concept Summary. CCEEMario Mendoza2 Newton’s Third Law  For every action, there is an equal and opposite reaction.

Slides:

Advertisements

Similar presentations

Newton’s Third Law of Motion:

Advertisements

Concept Summary Batesville High School Physics. Newton’s Third Law  For every action, there is an equal and opposite reaction.

Newton’s Third Law of Motion: Action and Reaction

Physics Physics Tutoring Wednesday: 2:15pm – 3:15pm.

Newton’s 3 rd Law of Motion Action - Reaction Chapter 6.3.

 What is a force?  What are the 6 main types of forces that we discussed?

HOMEWORK Page: 115 Problems: all even.

Unit 4-2: Actions and Reactions. Identifying Action and Reaction Forces »Identifying action/reaction pairs is not always easy. »Try to identify the action/reaction.

Newton’s Third Law Action/Reaction Force Pairs. Review of Newton’s Laws Newton’s First Law - tells you what happens to an object if the net force on it.

Forces and Newton’s Third Law

Aristotle’s View  Two types of motion:  Natural motion - what an object “naturally wants to do”  Violent motion - what an object has to be forced to.

Newton’s Third Law of Motion

Newton’s Third Law of Motion

Newton’s third law of motion – action and reaction

Newton’s Third Law of Motion. Momentum.

Newton’s 2 nd Law. Enduring Understanding: Studying dynamics (causes of motion) has had a profound effect on the way humans view their world. Essential.

Newton's Third Law of Motion

Newton’s 3 rd Law Action-Reaction Forces For every action, there is an equal and opposite reaction. According to Newton, whenever two objects interact.

Newton’s Third Law of Motion

Newton’s Third Law Action and Reaction. What is an interaction? Interactions occur when one object exerts a force on another object. The result is the.

Newton’s Third Law of Motion

Newton’s Third Law of Motion Action and Reaction.

Physical Science Ch. 6 Forces are part of a mutual action called INTERACTION. WHERE IS THE INTERACTION IN THIS PICTURE?

Newton’s Third Law of Motion: Action-Reaction 8SCIENCE.

Honors Physics Newton’s First and Third Laws of Motion.

How to Calculate Net Force

For every force, there is an equal and opposite force.

Concept Summary. Newton’s Third Law  For every action, there is an equal and opposite reaction.

Newton’s Third Law Chapter 6.

Objectives Define force as part of an interaction. (6.1)

 An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted.

1 Describing Motion Newton’s Laws. 2 First we need to define the word FORCE: The cause of motion (what causes objects to move) Two types of forces –Pushes.

Chapter 5 Newton’s Third Law of Motion. Newton’s Laws For every action force there is an equal and opposite reaction force (You cannot touch without being.

How can we describe how objects move?. The law of BALANCED FORCES  Objects at rest tend to stay at rest.  Objects in motion tend to stay in motion.

Ch. 3 & 4 Motion & Forces VI. Action and Reaction  Newton’s Third Law  Momentum  Conservation of Momentum.

BELLWORK 11/12/2015 A car has a mass of 1.50 x 103kg. If the force acting on the car is 6.75 x 103N to the east, what is the car’s acceleration?

Newton’s Third Law of Motion In any interaction between two objects, the forces exerted are always equal in magnitude and opposite in direction. “For every.

Newton’s Third Law. Newton’s 3 rd Law For every action there is an equal and opposite reaction.

Notes: Chapter 11.3 Newton’s Third Law of Motion and Momentum.

Chapter Newtons 3 rd law. Newton’s 3 law 1. An object in motion/rest remains unless acted on by a force 2. Force= mass x acceleration. The amount.

Newton’s 3 rd Law. Newton’s 2 nd Law is: A quantitative description of how forces affect motion. BUT: Where do forces come from? –Answer this with EXPERIMENTS!!

Newton’s 3 rd Law Newton’s 2 nd Law: A quantitative description of how forces affect motion BUT: Where do forces come from? EXPERIMENTS show that Forces.

Newton’s Third Law Chapter 5. Forces & Interactions  Remember: A force is a push or pull.  In a broader sense, a force is not a thing, but an interaction.

Newton’s Third Law of Motion: Action and Reaction.

Chapter 2: Newton’s Laws of Motion 2.1 Newton’s First Law of Motion 2.2 Newton’s Second Law of Motion 2.3 Forces and Interactions 2.4 Newton’s Third Law.

Chapter 10 Section 4 Newton’s Third Law. Newton’s Third Law of Motion Newton’s third law of motion states that if one object exerts a force on another.

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

How To Calculate Net Force

Newton’s 3rd law.

Newton’s 3rd Law of Motion

Newton’s Second Law of Motion

Newton’s Third Law of Motion

Newton’s 3rd Law of motion

Lesson Five – Forces Newtons laws The third law

Newton’s Third Law of Motion states that for every ________________________ force, there is an equal and opposite ________________________ force. Forces.

Newton’s Three Laws of Motion

Chapter 4 Force Ewen et al (2005)

Newton’s Third Law Chapter 13 Section 3 Part 3.

Newton’s Third Law Chapter 13 Section 3 Part 3.

Concept Summary Vista Peak Physics

Newton’s 3rd Law and Law of Gravitation

For every action there is an equal and opposite reaction.

Newton’s Third Law Chapter 13 Section 3 Part 3.

Newton’s Third Law Chapter 13 Section 3 Part 3.

Section 3 Newton’s Third Law p. 360

Ch.4 Newton's Laws of Motion & Net Forces.

Presentation transcript:

CCEEMario Mendoza1 Concept Summary

CCEEMario Mendoza2 Newton’s Third Law  For every action, there is an equal and opposite reaction.

CCEEMario Mendoza3 What are “action” and “reaction”?  “Action” and “Reaction” are names of forces.

CCEEMario Mendoza4 “For every action…reaction”  “For every action force, there is … a reaction force” means:  Forces ALWAYS occur in pairs.  Single forces NEVER happen.

CCEEMario Mendoza5 Action & Reaction Forces  Since a force is an interaction between objects, two objects are involved in every force. Call the objects A and B:  Action force: “A pushes B”  Reaction force: “B pushes A”

CCEEMario Mendoza6 “Equal”  In Newton’s Third Law, “equal” means:  Equal in size.  The action and reaction forces are EXACTLY the same size.  Equal in time.  The action and reaction forces occur at EXACTLY the same time.

CCEEMario Mendoza7 “opposite”  In Newton’s Third Law, “opposite” means:  Opposite in direction  The action and reaction forces are EXACTLY 180 o apart in direction.

CCEEMario Mendoza8 Two Logical Difficulties 1. If Newton’s Third Law action & reaction forces are equal and opposite, how come they don’t always cancel, making net force and acceleration impossible? (This is the question in the “Horse and Wagon” problem.)

CCEEMario Mendoza9 The Keys to Understanding  Only forces pushing or pulling on an object affect the object’s motion.  Only forces that act on the same object can cancel.  Newton’s Third Law action and reaction forces push/pull on different objects, so they don’t cancel.

CCEEMario Mendoza10 Action & Reaction Again  The (action) force “A pushes B” affects the motion of object B.  The (reaction) force “B pushes A” affects the motion of object A.  The action and reaction forces don’t cancel since they push on different objects.

CCEEMario Mendoza11 The Other Logical Problem 2. If the Newton’s Third Law action and reaction forces are always equal and opposite, how do two objects of different sizes get different accelerations in the same interaction? (When a bug hits a windshield, different things happen to the bug and windshield.)

CCEEMario Mendoza12 The Second Difficulty Addressed  If the action and reaction forces are the same size, how can two objects push on each other and get different accelerations?  Newton’s Second Law says that the acceleration of an object depends not only on the force on it, but on the object’s mass.

CCEEMario Mendoza13 Don’t Forget Mass!  The same force acting on objects of different mass will produce different accelerations! F net m a = m = a Same Force

CCEEMario Mendoza14 Internal Forces  It is possible for Newton’s Third Law action/reaction forces to cancel - if they act on different parts of the same object.  These forces are called “internal forces”.

CCEEMario Mendoza15 Systems  The object or objects that you are dealing with in a given situation is called a “system”.  How you pick your system determines whether a particular action/reaction force pair will cancel or not.

CCEEMario Mendoza16 Systems  There is no “trick” to picking a “correct” system - Newton’s Laws will work just fine in any system.