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Chapter 3: Turning Effect of Force
1. Why This Matters
Have you ever used a spanner to loosen a tight nut? Or sat on a see-saw with a friend? Or tried to open a heavy door by pushing near the hinges? All of these involve a turning effect of force — what physicists call a moment.
A moment is the turning effect produced by a force acting at a distance from a pivot. Understanding moments explains why a long spanner loosens a nut more easily than a short one, why a door handle is placed far fro
