On which surface do your shoes or sandals wear out faster? *
A. on rough surface
B. on watery surface
C. on smooth surface
D. on muddy surface
A. on rough surface
B. on watery surface
C. on smooth surface
D. on muddy surface
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Answer:
Rougher surfaces have more friction between them than smoother surfaces. That's why we put sand on icy sidewalks and roads. You can't slide as far across ice with shoes as you can on the blades of skates (see Figure below). The rougher surface of the soles of the shoes causes more friction and slows you down.