Lesson Plan

• Recall the kinetic‑energy formula Ek = ½ m v².
• Explain how mass and speed influence kinetic energy.
• Apply the formula to calculate kinetic energy for given masses and speeds.
• Rearrange the equation to solve for speed when kinetic energy and mass are known.
• Identify and correct common errors such as unit mismatches and omitting the ½ factor.

• Projector or interactive whiteboard
• Whiteboard and markers
• Printed worksheet with practice questions
• Calculators (one per student)
• Demonstration set (tennis ball and racket)
• Formula and unit reference chart

Begin with a quick question: “What type of energy does a moving car have?” Connect this to prior learning about energy forms and units. State that by the end of the lesson students will be able to accurately use the kinetic‑energy equation and spot typical mistakes.

1. Do‑now (5’) – short quiz on energy types and SI units.
2. Mini‑lecture (10’) – derive Ek = ½ m v² from the work‑energy principle, emphasise units.
3. Guided example (8’) – solve the tennis‑ball problem together, highlighting squaring of speed.
4. Pair practice (12’) – students complete the four practice questions using calculators; teacher circulates.
5. Common‑mistakes discussion (5’) – review typical errors and have pairs correct a faulty solution.
6. Exit ticket (5’) – each student writes the formula, defines its variables, and gives one real‑world example of kinetic energy.

Summarise the link between mass, speed, and kinetic energy and remind students of the correct form of the equation. Collect exit tickets as a retrieval check and assign homework: complete a set of extra problems involving rearranging the formula for speed.