Which of the following is the best definition of inertial frame?
A. a frame of reference in which Newtonian mechanics holds true, but relativistic mechanics does not
B. a frame of reference in which relativistic mechanics holds true, but Newtonian mechanics does not
C. a frame of reference where there are no accelerations without applied forces
D. a frame of reverence in which Newton's second and third laws hold, but not his first
E. None of these choices are correct.
C. a frame of reference where there are no accelerations without applied forces
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