Exam-style question
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Which scenario demonstrates the application of the principle of relativity to a non‑accelerating laboratory?.
- A.A particle accelerator accelerating electrons to near light speed.
- B.A pendulum swinging in a stationary lab.
- C.A rocket accelerating in space.
- D.A rotating merry‑go‑round.
Model answer
What a good answer should say
- A pendulum swinging in a stationary lab.
Explanation
Why this works
Formula/Rule: Principle of relativity applies to inertial (non‑accelerating) frames. Substitution: stationary laboratory is an inertial frame.
Working: The pendulum’s motion follows the same Newtonian laws as it would in any other inertial frame; no external acceleration is present. Answer: A pendulum swinging in a stationary lab.
Units/Conclusion: inertial frame.
Common mistake
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