The force that tends to resist motion between objects in contact is called:

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Multiple Choice

The force that tends to resist motion between objects in contact is called:

Friction is the force that resists motion between surfaces in contact. It acts whenever two surfaces touch, and it can prevent motion if the applied force isn’t enough to overcome it (static friction) or oppose motion once sliding begins (kinetic friction). This resistance comes from microscopic roughness and interlocking between the surfaces, amplified by how hard the surfaces are pressed together (the normal force). Other ideas like momentum (motion quantity), inertia (resistance to a change in motion), and torque (a turning effect) describe different concepts, not the interfacial resistance between contacting surfaces. That makes friction the correct term here.

Friction is the force that resists motion between surfaces in contact. It acts whenever two surfaces touch, and it can prevent motion if the applied force isn’t enough to overcome it (static friction) or oppose motion once sliding begins (kinetic friction). This resistance comes from microscopic roughness and interlocking between the surfaces, amplified by how hard the surfaces are pressed together (the normal force).

Other ideas like momentum (motion quantity), inertia (resistance to a change in motion), and torque (a turning effect) describe different concepts, not the interfacial resistance between contacting surfaces. That makes friction the correct term here.

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