Concept explainers
You apply the brakes of your car abruptly and your book starts sliding off the front seat. Three observers explain this differently. Observer A says that the book continued moving and the car accelerated from underneath it. Observer B says that the car pushed forward on the book. Observer C says that she must be in a noninertial reference frame because the book started moving without any extra objects interaction with it. Which of the observers is correct?
a. A
b. B
c. C
d. A and C
e. All of the observers
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