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4. Newton's Third Law. If objects collide, the object with more mass applies more force. Momentum is a measure of how hard it is to stop a moving object. 4. Newton's Third Law. 4. Newton's Third Law. What is Newton’s third law of motion? - PowerPoint PPT Presentation
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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?
4 Newton's Third Law
Get Ready
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LESSON INTRODUCTION
Do you agree or disagree?
• If objects collide, the object with more mass applies more force.
• Momentum is a measure of how hard it is to stop a moving object.
4 Newton's Third Law
Key Concepts/Essential Questions
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LESSON INTRODUCTION4 Newton's Third Law
• What is Newton’s third law of motion?
• Why don’t the forces in a force pair cancel each other?
• What is the law of conservation of momentum?
Vocabulary
Watch out for these words!
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LESSON INTRODUCTION
• Newton’s third law of motion
• force pair
• momentum
• law of conservation of momentum
4 Newton's Third Law
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LESSON INTRODUCTION4 Newton's Third Law
Why move up?
Look at the photo at the beginning of the lesson. To reach the height she needs for her dive, this diver must move up into the air. Does she just jump up? No, she doesn’t. She pushes down on the diving board and the diving board propels her into the air. How does pushing down cause the diver to move up?
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4 Newton's Third Law
Lesson Review
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LESSON WRAP-UP
Do you agree or disagree?
If objects collide, the object with more mass applies more force.
4 Newton's Third Law
Disagree. If two objects collide and exert a force on each other, the objects exert equal force on each other.
Lesson Review
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LESSON WRAP-UP
Do you agree or disagree?
Momentum is a measure of how hard it is to stop a moving object.
4 Newton's Third Law
Agree. Momentum is the product of an object’s mass and velocity.
Key Concept/Essential Question Review
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LESSON WRAP-UP
What is Newton’s third law of motion?
4 Newton's Third Law
Newton’s third law of motion states that when one object applies a force on another, the second object applies an equal force in the opposite direction on the first object.
Key Concept/Essential Question Review
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LESSON WRAP-UP
Why don’t the forces in a force pair cancel each other?
4 Newton's Third Law
The forces of a force pair do not cancel because they act on different objects.
Key Concept/Essential Question Review
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LESSON WRAP-UP
What is the law of conservation of momentum?
4 Newton's Third Law
According to the law of conservation of momentum, momentum is conserved during a collision unless an outside force acts on the colliding objects.
