| Lesson Plan |
| Grade: |
Date: 01/12/2025 |
| Subject: Physics |
| Lesson Topic: define power as work done per unit time |
Learning Objective/s:
- Describe the relationship between work, energy, and power.
- Explain how power is calculated for constant and variable forces.
- Apply the power formula to solve problems involving kinetic‑energy changes.
- Distinguish between units of energy (J) and power (W) and convert between them.
- Identify common misconceptions about power and correct them.
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Materials Needed:
- Projector and screen
- Whiteboard and markers
- Worksheet with example problem
- Scientific calculators
- Printed diagram of a block being pulled
- Access to an online power‑simulation applet
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Introduction:
Begin by asking students how quickly a car can accelerate and why that matters in real life. Connect this to their prior knowledge of work and energy from previous lessons. Explain that today they will learn to quantify “how fast” work is done by defining power. Success will be measured by their ability to state the definition, use the correct formula, and solve a power problem.
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Lesson Structure:
- Do‑now (5'): Quick quiz on work and energy definitions to activate prior knowledge.
- Mini‑lecture (10'): Introduce power, its formulas (P = W/t, P = dW/dt, P = F·v) and units; display the block‑pull diagram.
- Guided example (12'): Solve the car‑acceleration problem step‑by‑step while students follow on the worksheet.
- Interactive simulation (8'): Students explore an online applet that varies force and velocity to see instantaneous power.
- Concept check (5'): Think‑pair‑share on the three listed misconceptions; teacher clarifies.
- Summary & exit ticket (5'): Students write the power definition and one real‑world example on a sticky note before leaving.
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Conclusion:
Recap that power measures the rate of doing work and ties directly to energy conservation. Collect exit tickets to gauge understanding and assign a short homework worksheet with two additional power calculations. Remind students to review the distinction between joules and watts before the next class.
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