Exam-style question
Try this first
Calculate the angular frequency of a pendulum that has a period of 2 seconds. Scenario focus: use circular motion in a distinct A-Level Physics context and identify the relevant physical quantity before choosing the answer.
Model answer
What a good answer should say
- The angular frequency (ω) can be calculated using the formula ω = 2π/T.
- Substituting the period, we have ω = 2π/2 = π rad/s.
Explanation
Why this works
The correct answer is The angular frequency (ω) can be calculated using the formula ω = 2π/T. 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
No common mistake is linked to this question yet.