Read Heat production
This SOF ISO pattern tests actions where friction produces heat. Read the condition carefully, then use the method below before you solve.
Motion and force questions become simpler when direction, starting condition, time and the acting forces are marked first.
Draw every push or pull as an arrow
Balanced arrows: no change · unbalanced: acceleration
Arrows show direction. Balanced arrows give no change in motion; an unbalanced resultant points toward the acceleration.
Find the tested idea
Identify the material, change or observable property first; this decides the scientific rule to use.
Work from the evidence
Use the experiment or stated observation as evidence. Compare each option with the property, particle model or reaction condition in the stem.
Verify before choosing
Use the wording, diagram and units exactly as given. Select an option only after it satisfies every stated condition.
OlympIQ exam lens
- ✓State the observed property.
- ✓Select the governing idea.
- ✓Test every claim against the evidence.
Keep physical changes, chemical changes and everyday appearances separate.
Ready to try the pattern?
100% coverage across the linked question.
Practise the linked question