Exam-style question
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According to the principle of relativity, which of the following is true?.
- A.The equations of mechanics are identical in all inertial frames.
- B.The laws of physics differ between accelerating and non‑accelerating frames.
- C.The speed of light is only constant in a vacuum.
- D.The mass of a particle increases with speed.
Model answer
What a good answer should say
- The equations of mechanics are identical in all inertial frames.
Explanation
Why this works
formula/rule: Principle of relativity – mechanical laws are the same in all inertial frames; substitution: none; working: none; answer: The equations of mechanics are identical in all inertial frames.; units/conclusion: This reflects the invariance of physical laws in inertial frames.
Common mistake
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