| Lesson Plan |
| Grade: |
Date: 01/12/2025 |
| Subject: Physics |
| Lesson Topic: define and use pressure |
Learning Objective/s:
- Define pressure as the normal force per unit area and write the formula p = F⊥/A.
- Convert between common pressure units (Pa, kPa, bar, atm, torr).
- Calculate pressure for a given normal force and contact area.
- Apply pressure calculations within static‑equilibrium problems.
- Identify and correct common misconceptions about pressure versus force and direction.
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Materials Needed:
- Projector and screen
- Whiteboard and markers
- Printed worksheet with practice problems
- Calculator for each pair
- Set of mass blocks (≈5 kg) and a ruler/measure tape
- Pressure‑unit conversion chart
- Diagram handout of a block on a table
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Introduction:
Begin with a quick demonstration: press a thumb onto a piece of paper and compare it to a high‑heeled shoe on the floor to illustrate how the same force can feel different. Review students’ prior knowledge of force (N) and area (m²). State that by the end of the lesson they will be able to define pressure, convert its units, and use it to solve equilibrium problems.
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Lesson Structure:
- Do‑now (5 '): Quick quiz on force and area definitions.
- Mini‑lecture (10 '): Define pressure, introduce the formula and SI units, show conversion table.
- Demonstration (8 '): Place a 5 kg block on a table, measure contact area, calculate pressure live.
- Guided practice (12 '): Students work in pairs on the worksheet example problem, calculate pressure and express it in kPa.
- Concept‑check (5 '): Clicker questions targeting common misconceptions (pressure vs. force, direction).
- Extension activity (10 '): Convert the calculated pressure into bar, atm, and torr; discuss uniform‑pressure assumption.
- Summary & exit ticket (5 '): Each student writes one correct statement about pressure and one misconception they corrected; collect.
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Conclusion:
Recap the definition, units, and calculation steps for pressure, emphasizing its role in equilibrium situations. Collect the exit tickets as a retrieval check. For homework, assign a set of mixed‑unit pressure problems and ask students to explain why pressure, not force, determines the effect on different surfaces.
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