CAIE IGCSE Physics Demonstrating Moment Equilibrium
Practise describing a pivoted metre-rule experiment that measures vertical forces and lever arms, then compares total clockwise and anticlockwise moments.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- balance a horizontal metre rule on a pivot with known masses hung on both sides
- measure perpendicular distances and show that summed clockwise and anticlockwise moments agree
1.5.2.6—An experiment to demonstrate that question 1
[Maximum number: 4]
Describe how a uniform metre ruler, a pivot and a selection of masses can be used to demonstrate that there is no resultant moment on an object in equilibrium.
You may include a labelled diagram in your answer.
1 place (the centre of) the metre ruler on the pivot owtte OR
(labelled) diagram showing metre ruler on a pivot
B1
2 add mass on one side (of pivot) and then add mass on other side to balance the ruler owtte
B1
3 (moment = ) force × perpendicular distance (from pivot)
B1
4 sum of clockwise moments = sum of anticlockwise moments (when in equilibrium)
B1
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