Rough surfaces create __ friction.

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Prepare for the Year 10 Force and Motion Test. Utilize flashcards and multiple-choice questions with clear hints and explanations to ensure success. Equip yourself for excellence on your exam!

Multiple Choice

Rough surfaces create __ friction.

Explanation:
Friction is the resistance to motion that arises where two surfaces touch. When surfaces are rough, their tiny bumps and pits grip each other more strongly because the asperities catch and interlock as you try to slide. This makes it harder to start moving and harder to keep moving, so more force is required. Therefore, rough surfaces create more friction. The amount can also depend on how hard the surfaces are pressed together and what materials they’re made of, but increasing roughness generally increases friction rather than decreases it.

Friction is the resistance to motion that arises where two surfaces touch. When surfaces are rough, their tiny bumps and pits grip each other more strongly because the asperities catch and interlock as you try to slide. This makes it harder to start moving and harder to keep moving, so more force is required. Therefore, rough surfaces create more friction. The amount can also depend on how hard the surfaces are pressed together and what materials they’re made of, but increasing roughness generally increases friction rather than decreases it.

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