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Friction
Explain friction as a contact force that opposes motion, and decide when it is useful and when it is a problem.
⏱ 17 min❓ 8 questions
What you'll be able to do
- ✔I can explain what causes friction and which direction it acts
- ✔I can identify situations where friction is useful and where it is unwanted
- ✔I can describe ways to increase or reduce friction
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.
- ✅Select all that apply — More than one can be right — pick every option that fits.
👪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.
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Curriculum: AC9S7U05