Multiple choice

Which of the following statements is/are false?

a. The interlocking of irregularities on the two surfaces opposes the motion of one object over another and gives rise to force of friction. b. Sliding friction comes into play when an object is moving over another object. c. The more the roughness of a surface, the larger is the number of irregularities on its surface and hence, the lesser will be the friction.

  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
E Correct answer
Explanation

This is the correct option as this statement is false. The more the roughness of a surface, the larger is the number of irregularities on its surface and hence, the greater will be the friction.

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