Lesson Plan

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Lesson Plan
Grade: Date: 17/01/2026
Subject: Physics
Lesson Topic: solve problems using P = W / t
Learning Objective/s:
  • Apply P = W⁄t to calculate the missing variable in physics problems.
  • Convert all given quantities to SI units before using the formula.
  • Analyse energy‑conservation scenarios by linking power to work and time.
  • Identify and avoid common errors such as unit mismatches and neglecting efficiency factors.
Materials Needed:
  • Projector or interactive whiteboard
  • PowerPoint slides with formulas and example problems
  • Worksheet containing practice questions
  • Scientific calculators
  • Ruler/graph paper for diagram sketching
  • Whiteboard markers
 Introduction:
Begin with a quick demonstration: ask students how long a 1500 W heater would take to raise water temperature, linking everyday experience to power concepts. Review prior knowledge of work, energy, and SI units. State that by the end of the lesson they will reliably solve for power, work, or time using P = W⁄t.
Lesson Structure:
  1. Do‑Now (5'): Students convert minutes to seconds for a simple power problem; teacher checks answers.
  2. Mini‑lecture (10'): Review definitions of work, power, and unit conversion; present the step‑by‑step algorithm.
  3. Guided example (15'): Work through Example 1 (heater) together, emphasizing SI conversion and formula rearrangement.
  4. Partner practice (15'): Students solve Example 2 (cyclist) on worksheets, compare results, and receive feedback.
  5. Common pitfalls discussion (5'): Highlight unit errors and efficiency considerations; correct a deliberately flawed solution.
  6. Exit ticket (5'): Each student writes the missing variable for a new set of values; collect for assessment.
Conclusion:
Summarise that power links the rate of energy transfer to work and time, and that correct unit conversion is essential. Students complete an exit ticket to demonstrate mastery and are assigned homework to create and solve two original P = W⁄t problems.