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ScienceForces & MotionAges 12–14

Moments, Pressure & Hooke's Law

Calculate the turning effect (moment = force × perpendicular distance), explain how pressure is transmitted equally in liquids (Pascal's principle) and the concept of atmospheric pressure, and describe Hooke's Law (extension ∝ force up to the elastic limit)

Lesson

Set out your lesson

Practise the bounded task in Moments, Pressure & Hooke's Law; see exact limits before inferring broader coverage.

Before teaching

Use this short check, then start teaching.

Activity

Multiply/divide and read a graph; distinguish distance from perpendicular distance.

Policy

Exact directed source edges retained; earlier authorship is not learner attainment.

Printer, credit, and teaching notes

Exact directed source edges retained; earlier authorship is not learner attainment.

Materials

  • These supplied stage cards

  • Scrap paper and pencil; oral/pointing response where appropriate

Sequence

  • Read readiness and decide on support without treating prerequisite authoring as learner readiness.

  • Open Show first and explain its model.

  • Use Guided Try with support and its separate adult key.

  • Close Show and guided keys before Try, unless this Try is explicitly supported.

  • Reflect on an actual attempt, including help used.

No Printer

Use the supplied screen cards; copying the exact task to paper is optional, not required.

Privacy

Use only invented scenarios and optional anonymous local notes. Do not request names, photos, family finances, medical data, accounts or uploads. Stop uncomfortable physical activity.

Use the complete materials on screen or print only the current sheet. Keep adult guidance out of learner view.

Next: Show

Adult extras
Teaching limits and safe use

These are finite task opportunities, not proof of mastery. Record what was attempted and what support was used.

  • Atmospheric pressure not assessed; elastic recovery cannot be inferred from loading data alone, so canonical elastic-limit identification blocked. No loaded springs or pressurised apparatus.

Use only invented scenarios and optional anonymous local notes. Do not request names, photos, family finances, medical data, accounts or uploads. Stop uncomfortable physical activity.

Share teaching feedback

Continue learning
Share and support
Family records and proof options

Keep a record of your learning

Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.

View learner plans ($12/mo per learner) See sample family archive

Learning resources

Extra practice links — they do not replace Gakuva’s teaching approach.

PhET Interactive Simulations · Practice link — not the full lesson

Under Pressure

Open practice (new tab)
Before you open · source notes

Under Pressure supports hands-on exploration for Moments, Pressure & Hooke's Law. Not every lab worksheet.

Free interactive page, no sign-in required for the tested path.

Before you open

Ask the learner what they changed in the sim or page and what they observed.

Opening this link does not save learning or assess mastery.

Source, access and review notes

Public PhET Interactive Simulations page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.

PhET Interactive Simulations. “Under Pressure.” External page; Gakuva does not copy, host, embed, or redistribute materials.

Unknown — link only

Check understanding

  • Calculates the moment of a force and uses the principle of moments to solve lever problems
  • Explains why hydraulic systems can multiply force (pressure transmitted equally)
  • States Hooke's Law and plots force-extension graphs identifying the elastic limit
  • Calculates spring constant k from a force-extension graph (k = F/x)
“If your child was using a long spanner to loosen a tight bolt, could they explain why a longer spanner makes it easier — and work out what force would be needed with a spanner of a specific length?”

Curriculum record

Type
Conceptual
Subject
Science
Domain
Forces & Motion
Age range
Ages 12–14

Standards

ngss-ms:MS-PS2-2uk-nc-2013:KS3.Sci.Phys.MotionAndForces.6uk-nc-2013:KS3.Sci.Phys.MotionAndForces.9