IGCSE Physics: Power | Edexcel Modular | Unit 3 | L10

IGCSE Physics: Power | Edexcel Modular | Unit 3 | L10

This lesson covers spec points 3.16 and 3.17 — describing power as the rate
of energy transfer and using P = W ÷ t to calculate power, work done and time.

PowerPoint includes:
• Retrieval starter reviewing work done and energy from L8
• Direct Instruction (I Do) — power defined as rate of energy transfer; the
watt defined as 1 joule per second; P = W ÷ t introduced with all three
rearrangements; time conversion from minutes to seconds emphasised; multi-
step power problems (weight → work done → power) modelled; show-that
questions introduced as an exam technique
• Guided Practice (We Do) — three problems: standard P = W ÷ t calculation;
time conversion problem; multi-step lift problem (weight → work → power)
• Independent Practice (You Do) — activity sheet with exam-style questions
• Review and Reflect — MCQs and exit ticket

Activity Sheet includes:
• Formula box: P = W ÷ t
• 13 exam-style questions plus stretch, providing extensive practice including
time conversions, all three rearrangements, two show-that questions and
multi-step problems (weight → work → power); contexts include a hairdryer,
athlete, vacuum cleaner and a student climbing stairs
• Stretch question: forklift — weight → work → power → efficiency, combining
L2 and L10 in a single multi-step problem
• Full mark scheme for teacher use