Question

Consider the following statements:

Statement 1: Irregularities on two surfaces lock into one another.
Statement 2: When we attempt to move any surface, we have to apply a force to overcome the interlocking.

Choose the correct option:

• A. True
• B. False
• C. Both the statements are correct.
• D. None of the statements is correct.

Answer 1

The correct option is C

Both the statements are correct.

Friction is caused by irregularities between two surfaces in contact. Even those surfaces which appear very smooth have a large number of irregularities on them. Irregularities on the two surfaces lock into one another. When we attempt to move any surface, we have to apply a force to overcome the interlocking between them.

Thus, both the statements are correct.