IGCSE Physics: Moments | Edexcel Modular | Unit 1 | L18

IGCSE Physics: Moments | Edexcel Modular | Unit 1 | L18

This lesson covers spec points 1.30P, 1.31P, 1.32P and 1.33P — knowing and using the moment equation, understanding the centre of gravity, applying the principle of moments, and understanding how support forces vary on a loaded beam. Physics only.

PowerPoint includes:
• Retrieval starter reviewing forces, weight and Newton’s laws
• Direct Instruction (I Do) — moment of a force defined as the turning effect about a pivot; M = F × d introduced; clockwise and anticlockwise moments distinguished; centre of gravity defined and located for uniform objects; principle of moments stated; worked example finding an unknown force using the principle of moments; beam supported at both ends — finding support forces including beam weight
• Guided Practice (We Do) — three tasks: calculate a moment from given force and distance; find an unknown force using the principle of moments; calculate support forces for a loaded beam
• Independent Practice (You Do) — moment calculations; principle of moments applied to balanced beams and asymmetric loading; beam-supported-at-ends problems with and without beam weight
• Review and Reflect — 3 MCQs and exit ticket

Activity Sheet includes:
• Formula box: M = F × d
• Labelled diagrams for the spanner, balanced beam, beam AB, see-saw and stretch question (beam with own weight)
• 8 exam-style questions plus stretch covering all four spec points: moment definition, equation, centre of gravity, principle of moments, and beams supported at both ends
• Stretch question requiring students to account for the beam’s own weight acting through its centre of gravity at the midpoint
• Full mark scheme for teacher use