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.

Question

Quizplus · Accepted Answer

An inertial frame of reference is a frame in which all objects move with constant velocity (whether that is zero or some non-zero velocity). In such a frame, there are no net forces acting on objects, meaning that there are no accelerations of objects without an applied force. This is the definition that best describes what an inertial frame is. It is unrelated to whether Newtonian or relativistic mechanics hold true in that frame.

Which of the Following Is the Best Definition of Inertial