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The Mechanical Universe by Tom M. Apostol, Richard P. Olenick, Steven C. Frautschi

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CHAPTER 9FORCES IN ACCELERATING REFERENCE FRAMES

    From the beginning it appeared to me intuitively clear that, judged from the standpoint of such an observer [moving relative to the earth], everything would have to happen according to the same laws as for an observer who, relative to the earth, was at rest.

    Albert Einstein, Autobiographical Notes (1949)

9.1 INERTIAL AND NONINERTIAL REFERENCE FRAMES

We have already introduced Galileo’s ideas on relative motion in Chapter 4. We defined inertial frames – frames in which the law of inertia holds – and remarked that an observer in any inertial frame deduces the same laws of motion, and has no way of determining whether he is at rest or moving in an absolute sense. Galileo was able to provide ...

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