Topic 1 · pp. 81–84 · Free
Topic Notes · Easy summaries with diagrams
Chapter 4 — Chapter 4 — Turning Effects of Force
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Topic 1 of 6
📘Easy summary
Like parallel forces act in the same direction; unlike parallel forces in opposite directions. The resultant is a single force having the same effect as all forces together. Forces are added by the head-to-tail rule. Two forces 4 N and 3 N give a resultant between 1 N (opposite) and 7 N (same direction); 5 N if perpendicular.
⭐Key points
- Line of action: line along which a force acts.
🔬Diagram
🌿Real-life example
Perpendicular 3 N and 4 N: R = √(9+16) = 5 N.
💡Exam tip
- State range for unknown angle.
✅Quick check
1. 4 N and 3 N resultant range:
2. Unlike forces act:
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