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Q: What is the term for the force that opposes the relative motion or tendency of such motion of two surfaces in contact?
  • A. Friction
  • B. Tension
  • C. Gravity
  • D. Inertia
Correct Answer: Option A - Friction–Friction always acts to oppose relative motion between two surfaces in contacts. Gravity–Gravity is a force that pulls things downward. Inertia–The tendency of an object to resist a change in its motion.
A. Friction–Friction always acts to oppose relative motion between two surfaces in contacts. Gravity–Gravity is a force that pulls things downward. Inertia–The tendency of an object to resist a change in its motion.

Explanations:

Friction–Friction always acts to oppose relative motion between two surfaces in contacts. Gravity–Gravity is a force that pulls things downward. Inertia–The tendency of an object to resist a change in its motion.