Exam-style question
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A satellite orbits the Earth with a period of 90 minutes. Convert this period into seconds and calculate the angular speed of the satellite in radians per second. Scenario focus: use centripetal acceleration 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 speed of the satellite is approximately 0.116 radians per second.
Explanation
Why this works
The correct answer is The angular speed of the satellite is approximately 0.116 radians per second.. This option is correct for Periodic motion because it applies the centripetal acceleration 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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