Exam-style question
Try this first
What is the turning effect of a couple?.
- A.It creates a net force that causes linear motion.
- B.It produces a rotational effect around a pivot point.
- C.It generates a torque that opposes motion.
- D.It results in a balanced force system.
Model answer
What a good answer should say
- It produces a rotational effect around a pivot point.
Explanation
Why this works
The cause of a couple is the application of two equal and opposite forces acting on an object. The mechanism involves these forces creating a torque about a pivot point, which results in a rotational effect.
The consequence is that the object will rotate without translating, leading to a change in its angular position.
Common mistake
No common mistake is linked to this question yet.