Kinetic friction is defined as?

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Multiple Choice

Kinetic friction is defined as?

Explanation:
Kinetic friction is the frictional force that opposes the motion when two surfaces are sliding past each other. It only exists with relative motion between surfaces, unlike static friction, which acts when there’s no motion. Rolling friction refers to resistance from a wheel or ball rolling, not sliding. Air resistance is drag from a fluid, not friction between contacting surfaces. For a given contact, kinetic friction is roughly μ_k times the normal force and tends to be constant, whereas static friction can vary up to μ_s N.

Kinetic friction is the frictional force that opposes the motion when two surfaces are sliding past each other. It only exists with relative motion between surfaces, unlike static friction, which acts when there’s no motion. Rolling friction refers to resistance from a wheel or ball rolling, not sliding. Air resistance is drag from a fluid, not friction between contacting surfaces. For a given contact, kinetic friction is roughly μ_k times the normal force and tends to be constant, whereas static friction can vary up to μ_s N.

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