Exam-style question
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What happens to the total mechanical energy of a simple harmonic oscillator during oscillation? Scenario focus: use circular motion in a distinct A-Level Physics context and identify the relevant physical quantity before choosing the answer.
- A.It remains constant.
- B.It increases continuously.
- C.It decreases continuously.
- D.It fluctuates randomly.
Model answer
What a good answer should say
- It remains constant.
Explanation
Why this works
The correct answer is It remains constant.. This option is correct for Periodic motion because it applies the circular motion idea in the stem and keeps the relevant quantity, unit, and physical conclusion together.
The alternatives either use a neighbouring formula, omit a required variable, or describe a different physical situation.
Common mistake
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