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What kind of characteristics of friction are the simple rules taught at school?
AAtomic scale characteristics
BMacroscopic characteristics
CChemical characteristics
DMagnetic characteristics
Answer & Solution
Correct answer: B. Macroscopic characteristics
1. The familiar rules describe friction as it appears at the scale we can see and measure.
2. Those are its macroscopic, or large scale, characteristics.
3. Separate research works at the atomic scale to explain why those rules hold.
4. That atomic work also explains where the heat of rubbing comes from.
_Source: OpenStax College Physics (CC BY 4.0), Ch 5 "Further Applications of Newton's Laws: Friction, Drag, and Elasticity", section Making Connections: Submicroscopic Explanations of Friction_
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