Question

science

what causes friction between two surfaces in contact?
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Answer 1

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Friction is a force that resists the relative motion between two objects or materials. The causes of this resistive force are molecular adhesion, surface roughness, and deformations. Adhesion is the molecular force resulting when two materials are brought into close contact with each other.

Answer 2

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Roughness and muscular force is the cause of friction between two surfaces in contact.

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