Question

Statement I: Friction opposes the motion of the surfaces in contact.
Statement II: Friction can happen without contact as well.
Select the correct statement(s).

• A. Only statement I is correct.
• B. Both the statements are incorrect.
• C. Only statement II is correct.
• D. Both the statements are correct.

Answer 1

The correct option is B Both the statements are incorrect.

Friction opposes the "relative" motion of the surfaces in contact, that means there should be motion between the two surface in contact.
As the above definition sums up, friction happens only when two bodies are in "contact".