physics: chapters 4 thru 6 newton’s three laws of motion physics according to gabe newton...
TRANSCRIPT
PHYSICS: CHAPTERS 4 thru 6Newton’s Three Laws of Motion
PHYSICS According to
GA
BE
Newton Schmewton…
I can tell you all you need to know about
the laws of motion…
The first law is…“Crawling is always more fun than being
stuck on your back.”
PHYSICS: CHAPTERS 4 thru 6Newton’s Three Laws of Motion
PHYSICS According to
GA
BE
Newton Schmewton…
I can tell you all you need to know about
the laws of motion…
The second law is…“Baby food is always more fun when it is
flying through the air.”
PHYSICS: CHAPTERS 4 thru 6Newton’s Three Laws of Motion
PHYSICS According to
GA
BE
Newton Schmewton…
I can tell you all you need to know about
the laws of motion…
The third law is…“Being tossed up in the air is a blast…unless
dad decides to drop you.”
PHYSICS: CHAPTERS 4 thru 6Newton’s Three Laws of Motion
PHYSICS According to
GA
BE
Seriously…
…we are going to review Newton’s
Laws of Motion using a technique called the “Framing Routine.”
PHYSICS: CHAPTERS 4 thru 6Newton’s Three Laws of Motion
PHYSICS According to
GA
BE
Seriously…
…get out your copy of the worksheet and
write things down as we go…
The Framing RoutineThe graphic organizer that we will use
looks like this:
Let’s start
with the key
topic.
____________
____________
____________
____________
____________
____________
____________
____________
____________
Is about…
Key Topic
Main Idea #1 Main Idea #2 Main Idea #3
So what…
The Framing RoutineThe Key Topic is/are…
Newton’s Laws of Motion
…and Newton’s Laws are about…
…the basic characteristics of motion…
The Framing Routine
____________
____________
____________
____________
____________
____________
____________
____________
____________
____________
____________
____________
…is/are about…. the basic characteristics of motion…
Key Topic… Newton’s Laws of Motion
So what…
The Framing RoutineThe First Law of Motion is…
First Law – Law of Inertia
What are some
important details
about the first law?
• The laws states: “An object in motion tends to stay in motion and an object at rest tends to stay at rest…unless acted on by an outside force.”
• Inertia is the property of an object to maintain its current state of motion.
• Inertia is closely related to mass.
• Friction is a common force that causes objects to slow down.
• A force must occur to change an object’s speed and/or direction.
The Framing RoutineThe First Law of Motion is…
First Law – Law of Inertia
What are some
important details
about the first law?
• _______________________________________
• _______________________________________
• _______________________________________
• _______________________________________
• _______________________________________
• _______________________________________
The Framing RoutineThe First Law of Motion is…
First Law – Law of Inertia
What are some
examples that
illustrate the first
law?
• Going around a sharp curve in a car
• The cork/ring/jar trick
• The tablecloth/dishes magic trick
• A Mack truck rolling down a hill as compared to Mr. Dillon’s Geo Metro
• ____________________________
• ____________________________
• ____________________________
The Framing Routine
____________
____________
____________
____________
____________
____________
____________
____________
• “An object in motion tends to stay in motion and an object at rest tends to stay at rest…unless acted on by an outside force.”
• Inertia is the property of an object to maintain its current state of motion.
• Inertia is closely related to mass.
• A force must occur to change an object’s speed and/or direction.
• Friction is a common force that causes objects to slow down.
• Etc.
• Examples
…is/are about…. the basic characteristics of motion…
Key Topic… Newton’s Laws of Motion
First Law (Inertia)
So what…
The Framing RoutineThe Second Law of Motion is…
Second Law – Law of Acceleration
What are some
important details
about the second law?
• The law states: “Force equals mass times acceleration.”
• F = m·a • This law is the mathematical relationship between
force, mass, and acceleration.
• If mass is the same, force and acceleration are directly proportional…which means…
• F stands for the net force. Be sure to calculate the net force first.
• If force is the same, mass and acceleration are inversely proportional…which means…
The Framing RoutineThe Second Law of Motion is…
Second Law – Law of Acceleration
What are some
important details
about the second law?
• _______________________________________
• _______________________________________
• _______________________________________
• _______________________________________
• _______________________________________
• _______________________________________
The Framing Routine
• The law states: “Force equals mass times acceleration.”
• F = m·a
• This law is the mathematical relationship between force, mass, and acceleration.
• F stands for the net force. Be sure to calculate the net force first.
• If mass is the same, force and acceleration are directly proportional…which means…
• If force is the same, mass and acceleration are inversely proportional…which means…
____________
____________
____________
____________
• “An object in motion tends to stay in motion and an object at rest tends to stay at rest…unless acted on by an outside force.”
• Inertia is the property of an object to maintain its current state of motion.
• Inertia is closely related to mass.
• A force must occur to change an object’s speed and/or direction.
• Friction is a common force that causes objects to slow down.
• Etc.
• Examples
…is/are about…. the basic characteristics of motion…
Key Topic… Newton’s Laws of Motion
First Law (Inertia)
Second Law (Acceleration)
So what…
The Framing RoutineThe Third Law of Motion is…
Third Law – Law of Action/Reaction
What are some
important details
about the third law?
• The law states: “For every action there is an equal and opposite reaction.”
• To find action/reaction pairs use the following recipe:
• Action/reaction pairs are always equal and opposite.
• Action/reaction pairs act on different objects.
A exerts a force on B. B exerts a force on A.
• Action/reaction pairs do not cancel out.
The Framing RoutineThe Third Law of Motion is…
Third Law – Law of Action/Reaction
What are some
important details
about the third law?
• Although the forces are the same, differences in mass cause differences in accelerations…which is what we perceive when looking at a situation.
• _______________________________________
• _______________________________________
• _______________________________________
• _______________________________________
• _______________________________________
The Framing RoutineThe Third Law of Motion is…
Third Law – Law of Action/Reaction
What are some
examples of action reaction pairs?
• Foot kicks wall.
• __________________
Wall kicks foot.
• Weight (a.k.a. Earth pulls you…) You pull Earth.
• Balloon pushes air. Air pushes balloon.
• Mr. Dillon kisses Mrs. Dillon. Mr. Dillon gets slapped.
• __________________
• __________________ • __________________
The Framing Routine
• The law states: “Force equals mass times acceleration.”
• F = m·a
• This law is the mathematical relationship between force, mass, and acceleration.
• F stands for the net force. Be sure to calculate the net force first.
• If mass is the same, force and acceleration are directly proportional…which means…
• If force is the same, mass and acceleration are inversely proportional…which means…
• The law states: “For every action there is an equal and opposite reaction.”
• A exerts force on B. B exerts force on A.
• Action/reaction pairs are always equal and opposite.
• Action/reaction pairs act on different objects.
• Action/reaction pairs do not cancel out.
• Although the forces are the same, differences in mass cause differences in accelerations…which is what we perceive when looking at a situation.
• Examples
• “An object in motion tends to stay in motion and an object at rest tends to stay at rest…unless acted on by an outside force.”
• Inertia is the property of an object to maintain its current state of motion.
• Inertia is closely related to mass.
• A force must occur to change an object’s speed and/or direction.
• Friction is a common force that causes objects to slow down.
• Etc.
• Examples
…is/are about…. the basic characteristics of motion…
Key Topic… Newton’s Laws of Motion
First Law (Inertia)
Second Law (Acceleration)
Third Law (Action/Reaction)
So what…
The Framing RoutineSo what…
Newton’s three laws of motion are relatively
simple ways to describe all motion. Any situation
can be analyzed using the three laws.
The Framing Routine
• The law states: “Force equals mass times acceleration.”
• F = m·a
• This law is the mathematical relationship between force, mass, and acceleration.
• F stands for the net force. Be sure to calculate the net force first.
• If mass is the same, force and acceleration are directly proportional…which means…
• If force is the same, mass and acceleration are inversely proportional…which means…
• The law states: “For every action there is an equal and opposite reaction.”
• A exerts force on B. B exerts force on A.
• Action/reaction pairs are always equal and opposite.
• Action/reaction pairs act on different objects.
• Action/reaction pairs do not cancel out.
• Although the forces are the same, differences in mass cause differences in accelerations…which is what we perceive when looking at a situation.
• Examples
• “An object in motion tends to stay in motion and an object at rest tends to stay at rest…unless acted on by an outside force.”
• Inertia is the property of an object to maintain its current state of motion.
• Inertia is closely related to mass.
• A force must occur to change an object’s speed and/or direction.
• Friction is a common force that causes objects to slow down.
• Etc.
• Examples
…is/are about…. the basic characteristics of motion…
Key Topic… Newton’s Laws of Motion
First Law (Inertia)
Second Law (Acceleration)
Third Law (Action/Reaction)
So what… Newton’s three laws of motion are relatively simple ways to describe all motion. Any situation can be analyzed using the three laws.
NEWTON’S LAWSMy first law of motion explains
all you need to know about inertia:
Newton’s First Law of Motion(a.k.a. Law of Inertia)
“An object in motion tends to stay in motion, and an object at rest tends to stay at rest…unless acted on by an outside
force.”
NEWTON’S LAWSMy second law of motion
explains, mathematically, how forces affect motion:
Newton’s Second Law of Motion(a.k.a. Law of Acceleration)
“Force equals mass times acceleration.”
amF
NEWTON’S LAWSMy third law of motion
explains the interaction of objects and forces:
Newton’s Third Law of Motion(a.k.a. Law of Action/Reaction)
“For every action, there is an equal and opposite reaction.”
PHYSICS IS
PHUN!