forces make a lovely pair action reaction newton’s 3 rd law
TRANSCRIPT
Forces Make a Lovely Pair
ACTION REACTIONNEWTON’S 3RD LAW
Identify one form of energy in this
picture
ENTRY TASK:
Note: Entry Tasks
are 10% of your
grade
Read Conceptual Physics pages 103-111 How did you summarize
Work? Potential Energy? Conservation of Energy?
Turn in reading summaries!!!
HOMEWORK QUESTIONS:
‘PERSONS, PLACES, AND THINGS HAVE ENERGY,
But we observe only the effects of energy when something is happening…’
- Paul G. HewittConceptual Physics
pg 103
ENERGY TRANSFERS & TRANSFORMATIONS
Example:Chemical Energy in the Battery
BecomesElectrical Energy in the Wire
When describing energy movement, include:
• Starting energy form & location
• Ending energy form & location
ENERGY TRANSFERS & TRANSFORMATIONS
THINK:Can you see another energy Transformation in this picture?Describe it to your neighbor. Use the guide above to help you.
When describing energy movement, include:
• Starting energy form & location
• Ending energy form & location
ENERGY TRANSFERS & TRANSFORMATIONS
When describing energy movement, include:
• Starting energy form & location
• Ending energy form & location
ENERGY TRANSFERS & TRANSFORMATIONS
When describing energy movement, include:
• Starting energy form & location
• Ending energy form & location
ENERGY TRANSFERS & TRANSFORMATIONS
When describing energy movement, include:
• Starting energy form & location
• Ending energy form & location
ENERGY TRANSFERS & TRANSFORMATIONS
When describing energy movement, include:
• Starting energy form & location
• Ending energy form & location
ENERGY TRANSFERS & TRANSFORMATIONS
When describing energy movement, include:
• Starting energy form & location
• Ending energy form & location
If a large truck runs into a small car,
what force(s) do you think are involved in the collision?
If there is more than one force, how do you think the forces compare in size and why?
STOP AND THINK
Force ~ A push or a pull
Mass ~ the amount of matter in an object
Velocity ~ the speed of an object in a direction
VOCABULARY
1. Draw a sketch making your prediction about the mass, speed and force of the vehicles involved
2. Explain why you made this prediction (in writing)
3. Share your thoughts with your neighbor
HOW MANY FORCES ARE INVOLVED IN A COLLISION AND HOW DO THOSE FORCES
COMPARE IN SIZE AND DIRECTION?
Size of Force
How does clay indicate if a force is bigger or smaller?
Direction of Force
How does clay show which direction a force came from?
CLAY AS A FORCE METER
EXPERIMENT!!!
What did you see? What did it mean?
RESULTS:
Energy Transfer & Transformation Practice
Complete Refl ection Questions (Forces Make a Lovely Pair)
Read Conceptual Physics pages 74-76 Introduction – Identifying Action and Reaction Write a 2-3 sentence summary of each section
Answer Review Questions 1-5 (page 83)Answer Think and Explain Questions 19-23 (page 84)
HOMEWORK: