Lesson Plan

• Describe the definitions of mechanical work, electrical work and how each represents energy transfer.
• Apply the formulas W = F·s·cosθ and W = V·I·t to calculate work in given situations.
• Analyse common misconceptions about work and distinguish work from other forms of energy transfer such as heat.
• Link the concept of work to power by explaining P = W/t.

• Projector and screen
• Whiteboard and markers
• Calculator worksheets (mechanical & electrical examples)
• Force sensor or 15 kg crate, spring scale, measuring tape
• Simple circuit kit (battery, lamp, ammeter)
• Printed handout of formulas & practice questions

Begin with the question, “What happens to the energy of a suitcase when you push it across the floor?” Students recall prior knowledge of force and displacement, then are told they will discover how that effort translates directly into transferred energy. Success criteria are stated: students will be able to define work, use the correct formulas, and explain the work‑energy relationship.

1. Do‑Now (5 min): Quick quiz on force, displacement and units.
2. Mini‑lecture (10 min): Definitions, formulae for mechanical and electrical work, and the work‑energy equivalence.
3. Demonstration (10 min): Push a crate with a spring scale; measure force and distance, calculate work together.
4. Guided Practice (15 min): Solve the mechanical work example on the board, students complete a similar worksheet.
5. Electrical Work Demo (10 min): Light a lamp from a battery, record voltage, current, time, compute work.
6. Independent Practice (15 min): Students answer the three practice questions, circulating for support.
7. Check for Understanding (5 min): Exit ticket – one sentence explaining why a force perpendicular to motion does no work.

Review the key point that work is the quantitative measure of energy transferred, whether mechanical or electrical. Collect exit tickets to gauge understanding and assign homework: complete a worksheet with additional mechanical and electrical work problems and a short reflection on the work‑power relationship.