Edexcel IGCSE Physics 1.32P Principle of moments
Practise balancing clockwise and anticlockwise moments to find unknown forces or distances in handles, gates, planks and hinged systems.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- state that equilibrium means clockwise moments equal anticlockwise moments about a pivot
- calculate F or distance by substituting force × perpendicular distance on each side
- apply the principle to parallel forces in one plane, keeping units in N m or N cm consistent
1.32P Principle of moments question 1
Diagram 1 shows a wooden plank balanced horizontally on two supports, A and B.
A block is suspended from the plank between the supports by a cable of negligible weight.
Diagram 1
The weight of the block is 260 N .
By taking moments about support A, calculate force F.
Assume the weight of the plank is negligible.
force F = ............ N
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