Multiple choice

The friction between two surfaces depends on which of the following factors?

a. The force of gravity of Earth. b. The smoothness or roughness of the two surfaces. c. The force with which the two surfaces are pressed together.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option. The friction between two surfaces depends on the smoothness or roughness of the two surfaces.

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