Physics Year 11 - Module 2 - Lesson 6
Work and Kinetic Energy
1. Key Ideas
Work is a deposit of energy. Kinetic energy is the balance. The work-energy theorem says the deposit always equals the change in balance — exactly.
- Definition of work in physics (W = Fs cosθ)
- Why a perpendicular force does zero work
2. Success Criteria
By the end, you should be able to:
- Definition of work in physics (W = Fs cosθ)
- Definition of kinetic energy (KE = ½mv²)
- The work-energy theorem: W net = ΔKE
3. Key Terms
4. Activity: Build the Lesson Map
Use the lesson to complete the table. Keep answers brief but specific.
| Prompt | Your answer |
|---|---|
| Main concept | |
| Important example | |
| Common mistake to avoid | |
| How this links to the next lesson |
5. Short Answer Questions
1. Explain this lesson goal in your own words: "Definition of work in physics (W = Fs cosθ)". Use one specific example from the lesson.
2. Apply this idea to a new example: "Definition of kinetic energy (KE = ½mv²)". Show your reasoning clearly.
3. Analyse why this idea matters for understanding Work and Kinetic Energy: "The work-energy theorem: W net = ΔKE".
6. Extend: Apply the Idea
A student gives a memorised answer about Work and Kinetic Energy but does not use evidence or reasoning.
Improve the answer by writing a stronger response that uses accurate terminology, a relevant example and a clear explanation.
7. Multiple Choice
1. What is the best first step when answering a question about Work and Kinetic Energy?
A. Identify the key concept being tested
B. Write every fact from memory
C. Ignore the command word
D. Skip examples and evidence
2. Which answer would show stronger understanding of Work and Kinetic Energy?
A. An answer with accurate terms and reasoning
B. A copied definition only
C. A single-word response
D. An answer with no example
3. What should you do if a question asks you to explain?
A. Link the idea to a reason or cause
B. List unrelated facts
C. Only draw a diagram
D. Write the shortest possible answer
8. Success Criteria Proof
Finish with evidence that you can do each success criterion.