IGCSE Physics: Core Practical — Hooke's Law | Edexcel Modular | Unit 1 | L14

IGCSE Physics: Core Practical — Hooke’s Law | Edexcel Modular | Unit 1 | L14

This lesson covers spec point 1.22 — investigating how extension varies with applied force for helical springs, metal wires and rubber bands.

PowerPoint includes:
• Retrieval starter reviewing force types and effects
• Direct Instruction (I Do) — practical method modelled step by step; equipment listed; how to measure natural length and extension correctly; importance of repeat readings; zero error identified; safety precautions explained; how to plot a force–extension graph
• Guided Practice (We Do) — worked example calculating extension from raw length measurements; identify anomalous results from a sample data set; decide on appropriate axes and scale
• Independent Practice (You Do) — students conduct the investigation, record results for a helical spring and a rubber band, calculate extensions, and plot results on the same axes
• Review and Reflect — evaluation questions on accuracy, anomalies and graph shape comparison

Practical and Activity Sheet includes:
• Results table with columns for load (N), length (cm), extension (cm) and repeat readings
• Blank force–extension grid for plotting spring and rubber band data on the same axes
• Comparison questions on the graph shapes for spring vs rubber band
• Evaluation questions on reliability, anomalies and improvements
• Full mark scheme for teacher use