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Mechanical Engineering QUESTION #2549
Question 1
A couple acting on a rigid body is classified as which type of vector?
  • Bound vector — must act at a specific point
  • Sliding vector — must act along its line of action
  • Free vector — can be placed anywhere without changing its effect✔️
  • Fixed vector — its point of application is immovable
Correct Answer Explanation
A couple is a free vector because its effect on a rigid body (pure rotation) is the same regardless of where the couple is applied. This contrasts with a force (sliding vector) whose line of action matters.