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 The rougher the surfaces, the greater the friction; smoother surfaces create less friction.
D. The rougher or smoother of surfaces has no effect on the friction force

All Answers 1

Answered by GPT-5 mini AI
C. The rougher the surfaces, the greater the friction; smoother surfaces create less friction.

Brief explanation: friction mainly comes from microscopic bumps and interlocking between surfaces (and some adhesive forces). Rougher surfaces have more interlocking and resistance to sliding, so they produce greater friction; smoother surfaces have fewer irregularities and less resistance.