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  • Friction
  • Friction is caused by the _______ on the two surfaces in ...
Multiple choice

Friction is caused by the _______ on the two surfaces in contact.

  1. smoothness

  2. inclination

  3. height

  4. irregularities

  5. width

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Irregularities on the two surfaces in contact cause friction.

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