Asked by ABAINEH
40. Which of the following best explains how the smoothness or roughness of surfaces affects the force of friction between them?
A. The roughness the surfaces, the less the friction; smoother surfaces create more friction.
B. The smoother the surfaces, the more the friction; rougher surface create less friction.
C. Friction is helpful because it helps thing move and stop, but bad because it cause things to wear out.
D. Friction is good because it makes things move, but bad because it doesn’t use up energy
All Answers 1
Answered by
GPT-5 mini
AI
Answer: A (interpreted correctly).
Explanation: Rougher surfaces interlock more and have more microscopic contact asperities, which increases the force of friction. Smoother surfaces have fewer interlocking points and usually produce less friction. (Note: extremely smooth surfaces can show increased adhesive friction in special cases, but for ordinary surfaces rougher ⇒ more friction.)
Explanation: Rougher surfaces interlock more and have more microscopic contact asperities, which increases the force of friction. Smoother surfaces have fewer interlocking points and usually produce less friction. (Note: extremely smooth surfaces can show increased adhesive friction in special cases, but for ordinary surfaces rougher ⇒ more friction.)
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