Force, mass and motion

Explore how the size of the net force and the mass of an object decide how quickly its motion changes.

⏱ 18 min❓ 8 questions

What you'll be able to do

✔I can explain that a bigger net force produces a bigger acceleration
✔I can explain that a bigger mass produces a smaller acceleration for the same force
✔I can use acceleration = net force ÷ mass to compare how quickly objects change their motion

How this works

1Read the short explanations first — they teach you what you need before each question.
2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.

What's inside

8 questions and 1 quick teaching card, including:

🔘Multiple choice — Tap the answer you think is best, then check it.
🔢Number answer — Work out the answer and type the number.

👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.

Curriculum: AC9S7U05