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ScienceForces & MotionAges 12–13

Newton's Third Law

State and apply Newton's Third Law: every force has an equal and opposite reaction force acting on a different object, distinguishing action-reaction pairs from balanced forces

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Teaching Table

Set out your lesson

Practise the bounded task in Newton's Third Law; see exact limits before inferring broader coverage.

Activity

Can name both objects in an interaction; all examples are descriptions, no pushing people, rockets or weapons.

Policy

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 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. Retain an earlier model only when the current step supplies it as context.

Teaching limits and safe use

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

  • Conceptual interaction pairs; no physical force measurements. Exact firearm-recoil clause is blocked and replaced with a harmless magnet example, not claimed equivalent full coverage.

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.

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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.

Learning resources

Reviewed external links that reinforce this concept. They do not replace Gakuva’s teaching approach.

No reviewed resources for this concept yet.

The teaching approach above still stands. Curated practice links will appear here as the shelf fills.

Check understanding

  • States Newton's Third Law correctly, identifying both the action and reaction force and the objects they act on
  • Gives at least two real-world examples (e.g. rocket propulsion, swimmer pushing off a wall)
  • Distinguishes a Newton's Third Law pair from balanced forces on the same object
  • Explains why a gun recoils when fired using Newton's Third Law
“If your child saw a video of a rocket launching into space, could they explain what force is pushing the rocket upward and where that force comes from — and which law of motion that demonstrates?”

Curriculum record

Type
Conceptual
Subject
Science
Domain
Forces & Motion
Age range
Ages 12–13

Standards

ngss-ms:MS-PS2-1uk-nc-2013:KS3.Sci.Phys.MotionAndForces.7