Science Forces & Motionusually ages 12–13

Newton's First & Second Laws

State and apply Newton's First Law (an object stays at rest or constant velocity unless acted on by a resultant force) and Second Law (force = mass × acceleration), including the relationship between mass, force, and acceleration

How to tell they’ve got it

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

States Newton's First Law and gives a real example (e.g. why a moving spacecraft doesn't need engines in space)
Uses F = ma to calculate force, mass, or acceleration given the other two quantities
Explains why a heavier object requires more force to achieve the same acceleration
Explains why seatbelts are needed in cars using Newton's First Law

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Try this together

If your child was asked why you need a seatbelt in a car but not when sitting still, could they explain what Newton's First Law says about moving objects — and then calculate how much force a 60 kg person experiences in a sudden stop?

Where this sits on the map

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

Builds on

Resultant Forcesages 11–12Newton's 1st and 2nd laws are defined in terms of resultant force — the concept of balanced and unbalanced forces must be understood first

Air Resistance & Frictionages 9–10Newton's laws explain why friction and air resistance slow objects down — the KS2 observation of resistance now has a theoretical explanation

Mass vs Weightages 11–12Gravity (weight = mg) is the main worked example for Newton's laws — mass/weight distinction gives concrete numbers for F = ma

Newton's First & Second Lawsthis skill · ages 12–13

Unlocks

Newton's Third Lawages 12–13Newton's Third Law is conventionally taught after the first two — students need Newton's 1st and 2nd as reference points to distinguish reaction pairs from balanced forces

Investigating Forcesages 12–13Testing F = ma experimentally requires knowing the relationship between force, mass and acceleration

solid = must come firstdashed = helps

Curriculum alignment

Candidate matches to official curriculum codes — machine-suggested, unreviewed (v0.1).

This skill sits beyond Year 6 in the Australian Curriculum, so no F–6 code is matched. It also sits beyond the NSW K–6 syllabuses. It also sits beyond Level 6 in the Victorian Curriculum.

Nearby on the map

Deformation & Fluid Pressureages 12–13 Electromagnetsages 12–13 Investigating Forcesages 12–13 Moments, Pressure & Hooke's Lawages 12–14

All Forces & Motion skills →