Multiple choice

Which of the following is the cause of friction between two surfaces?

  1. The force of attraction between the two surfaces in contact

  2. The interlocking of the irregularities of the surfaces in contact

  3. The force of repulsion between the two surfaces in contact

  4. The gravitational pull of the earth on the two surfaces
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Friction is caused due to the interlocking of irregularities of the surfaces in contact.

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