How can you tell they’ve got it: Balanced & Unbalanced Forces?

If they’ve got it, you’ll see things like: Define balanced forces (equal in size, opposite in direction — no change in motion) and unbalanced forces (cause motion to change); Plan a fair test investigating how different force sizes affect an object's motion; Use results as evidence to explain when forces are balanced versus unbalanced. Or just try it together: Can your child explain why a book sitting on a table doesn't move (balanced forces) but slides when you push it (unbalanced forces)?

Science Forces & Motion Ages 8–9

Balanced & Unbalanced Forces

Your child can explain why a book on a table stays still — the forces are equal, or balanced. Push it, and the forces become unequal, so it slides.

In curriculum terms

Plan and conduct an investigation to provide evidence of the effects of balanced and unbalanced forces on the motion of an object

Ages are typical, not deadlines — follow your child’s pace. How to help at home →

How to tell they’ve got it

Tick these off as you see them — no test required.

Define balanced forces (equal in size, opposite in direction — no change in motion) and unbalanced forces (cause motion to change)
Plan a fair test investigating how different force sizes affect an object's motion
Use results as evidence to explain when forces are balanced versus unbalanced

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Try this together

Can your child explain why a book sitting on a table doesn't move (balanced forces) but slides when you push it (unbalanced forces)?

Where this sits on the map

Stuck here? Check the skills it builds on first. Confident? Here’s what it unlocks.

Builds on

Pushes & Pullsages 5–6Must understand pushes/pulls before investigating balanced vs unbalanced forces

Drawing Force Diagramsages 7–12Investigating balanced and unbalanced forces requires drawing force diagrams to record and analyse experimental findings

Friction & Surfacesages 7–8Must understand friction affects motion before investigating balanced/unbalanced forces

Balanced & Unbalanced Forcesthis skill · ages 8–9

Unlocks

Predicting Motion Patternsages 8–9Must understand balanced/unbalanced forces before measuring motion patterns for prediction

Levers, Pulleys & Gearsages 9–10Must understand forces and their effects before learning how mechanisms multiply forces

Gravity & Falling Objectsages 9–11Balanced/unbalanced forces supports understanding gravity as an unbalanced force on unsupported objects

solid = must come firstdashed = helps

Curriculum alignment

Where this fits in the official school curriculum — our best automated guess, not yet checked by a person.

Show candidate curriculum codes · 1 ACARA · 3 VIC

Australian Curriculum v9 candidate

AC9S4U03low confidenceYear 4 · Science understanding

identify how forces can be exerted by one object on another and investigate the effect of frictional, gravitational and magnetic forces on the motion of objects

Victorian Curriculum 2.0 codes & levels only

VC2TDE4C01low confidenceDesign and Technologies · Levels 3 and 4 · Technologies Contexts strand

VC2S4I02low confidenceScience · Levels 3 and 4 · Science Inquiry strand

VC2S4I05low confidenceScience · Levels 3 and 4 · Science Inquiry strand

These are candidate alignments generated by semantic matching — machine-suggested and unreviewed (v0.1), not official or verified mappings. For official curriculum content see australiancurriculum.edu.au, curriculum.nsw.edu.au and f10.vcaa.vic.edu.au. Don’t rely on them for registration or compliance purposes.

Nearby on the map

Predicting Motion Patternsages 8–9 Air Resistance & Frictionages 9–10 Contact & Non-Contact Forcesages 7–8 Drawing Force Diagramsages 7–12

All Forces & Motion skills →