Question

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Does friction oppose motion or relative motion of surfaces in contact? Discuss?give examples
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Answer 1

Friction is a force that opposes relative motion between surfaces in contact. One of the simpler characteristics of friction is that it is parallel to the contact surface between surfaces and always in a direction that opposes motion or attempted motion of the systems relative to each other. Definition A

Friction opposes the relative motion between the surfaces in contact with each other.

Friction opposes the relative motion between the surfaces in contact with each other.Friction is the force that opposes relative motion or tendency of relative motion between two surfaces in contact. When two surfaces move relative to each other or they have a tendency to move relative to each other, at the point (or surface) of contact, there appears a force which opposes this relative motion or tendency of relative motion between two surfaces in contact. It acts on both the surfaces in contact with equal magnitude and opposite directions (Newton's 3rd law). also Friction force tries to stop relative motion between two surfaces in contact.

DEFINITION B

Answer 2

here's your answer

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Friction is a force that opposes relative motion between systems in contact. One of the simpler characteristics of friction is that it is parallel to the contact surface between systems and always in a direction that opposes motion or attempted motion of the systems relative to each other.

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hope it helps you