Question Detail
Question
Which of the following constitutes a couple? (i) Parallel forces; (ii) Two equal forces; (iii) Two equal and opposite forces whose lines of action do not meet
Correct Answer
Option C is the correct answer.
Detailed Explanation
A couple consists of two equal and opposite forces that are parallel and whose lines of action do not coincide. So statement (iii) correctly describes a couple. Parallel forces alone (i) could be in the same direction, and two equal forces (ii) could be in the same direction, so they do not necessarily form a couple.
Hint
A couple produces pure rotation without translation.