Exam-style question
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What happens to an object in equilibrium when the moments are not balanced?.
- A.It remains stationary.
- B.It rotates about the pivot.
- C.It moves in a straight line.
- D.It gains potential energy.
Model answer
What a good answer should say
- It rotates about the pivot.
Explanation
Why this works
If the moments are not balanced, the object will experience a net moment, causing it to rotate about the pivot until equilibrium is restored.
Common mistake
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