Physics Year 11 - Module 2 - Lesson 3
Inclined Planes
1. Key Ideas
The trolley did not need a push. The slope itself did it — by redirecting gravity into a force along the surface. Here is exactly how.
- W// = mg sin theta — force down slope
- Why objects accelerate on slopes without a push
2. Success Criteria
By the end, you should be able to:
- W// = mg sin theta — force down slope
- Wperp = mg cos theta — force into slope
- N = mg cos theta on an inclined plane
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: "W// = mg sin theta — force down slope". Use one specific example from the lesson.
2. Apply this idea to a new example: "Wperp = mg cos theta — force into slope". Show your reasoning clearly.
3. Analyse why this idea matters for understanding Inclined Planes: "N = mg cos theta on an inclined plane".
6. Extend: Apply the Idea
A student gives a memorised answer about Inclined Planes 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 Inclined Planes?
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 Inclined Planes?
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.