Which term describes resistance to motion between two touching surfaces?

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Multiple Choice

Which term describes resistance to motion between two touching surfaces?

Explanation:
Friction is the resistance to motion between two touching surfaces. This force arises from the roughness of surfaces and the interactions between molecules at the point of contact, so it can both prevent motion (static friction) and oppose motion that has already started (kinetic friction). Recoil describes a backward movement after an object is released, pressure is the push per unit area, and work is the transfer of energy when a force moves something through a distance. None of those describe the resistance that surfaces exert on each other as they try to slide.

Friction is the resistance to motion between two touching surfaces. This force arises from the roughness of surfaces and the interactions between molecules at the point of contact, so it can both prevent motion (static friction) and oppose motion that has already started (kinetic friction). Recoil describes a backward movement after an object is released, pressure is the push per unit area, and work is the transfer of energy when a force moves something through a distance. None of those describe the resistance that surfaces exert on each other as they try to slide.