Exam-style question
Try this first
In a system at equilibrium, if the clockwise moments equal 20 Nm, what must the counterclockwise moments also equal?.
- A.0 Nm
- B.10 Nm
- C.20 Nm
- D.30 Nm
Model answer
What a good answer should say
- 20 Nm
Explanation
Why this works
According to the principle of moments, for an object to be in equilibrium, the total clockwise moments must equal the total counterclockwise moments. Therefore, counterclockwise moments = 20 Nm.
Common mistake
No common mistake is linked to this question yet.