Balanced and unbalanced forces

Combine the forces on an object to find the net force, and use it to predict whether the object's motion will change.

⏱ 18 min❓ 9 questions

What you'll be able to do

✔I can calculate the net force when forces act in the same or opposite directions
✔I can explain that balanced forces leave an object's motion unchanged
✔I can predict whether an unbalanced force will make an object speed up, slow down or change direction

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

9 questions and 1 quick teaching card, including:

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

👪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