Question

What is dry friction ?
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Answer 1

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Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact. Dry friction is subdivided into static friction ("stiction") between non-moving surfaces, and kinetic friction between moving surfaces. With the exception of atomic or molecular friction, dry friction generally arises from the interaction of surface features, known as asperities

Answer 2

Answer:

Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.