Lesson Plan

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Lesson Plan
Grade: 10 Date: 25/02/2026
Subject: Physics
Lesson Topic: Know the principle of the conservation of energy and apply this principle to simple examples including the interpretation of simple flow diagrams
Learning Objective/s:
  • Describe the principle of conservation of energy and its mathematical expression.
  • Identify and differentiate common forms of energy and their symbols.
  • Apply energy conservation to solve quantitative problems involving kinetic, gravitational, elastic, and electrical energy.
  • Construct and interpret simple energy flow diagrams for everyday situations.
Materials Needed:
  • Projector and screen
  • Whiteboard and markers
  • Printed worksheets with flow‑diagram tasks
  • Calculators or classroom computers
  • Small masses, springs, metre ruler for demos
  • Power supply and resistor for electrical demo
 Introduction:
Begin with a short video of a roller‑coaster drop to capture interest. Ask students what they think is happening to the energy as the car speeds down and up. Explain that by the end of the lesson they will be able to state the conservation principle, use it in calculations, and represent energy changes with flow diagrams.
Lesson Structure:
  1. Do‑now (5') – quick quiz on energy forms from the previous lesson.
  2. Mini‑lecture (10') – present the conservation principle, equations, and symbols using the projector.
  3. Guided demonstration (10') – pendulum and spring‑car demos; students predict speeds using energy equations.
  4. Flow‑diagram activity (10') – groups draw diagrams for given scenarios on worksheets and explain the transfers.
  5. Worked‑example practice (10') – solve the three example problems together, checking each step.
  6. Formative check (5') – exit ticket: write the conservation equation and one flow diagram for a new situation.
Conclusion:
Summarise that total energy remains constant while forms change, and flow diagrams help visualise these transfers. Collect exit tickets as a quick assessment and assign homework to complete a set of additional energy‑conservation problems.