Complete the following statement: An inertial reference frame is one in which A)Newton's first law of motion is valid. B)the inertias of objects within the frame are zero. C)the frame is accelerating. D)the acceleration due to gravity is greater than zero m/s². E)Newton's second law of motion is not valid.

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An inertial reference frame is a frame of reference in which Newton's first law of motion is valid. This law states that an object at rest stays at rest and an object in motion moves with a constant velocity (which may be zero) unless acted upon by a net external force. In other words, in an inertial reference frame, there are no fictitious forces or accelerations that appear due to the motion of the frame itself.

Complete the Following Statement: an Inertial Reference Frame Is One