Why Is an Accelerated Frame of Reference Non-Inertial?

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katrina00
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Why an accelerated frame of reference is non-inertial?
 
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An accelerating frame is not inertial because Newton's laws are not valid in such a frame. An object with no forces acting on it does not move along a straight line at a constant speed when viewed from the perspective of that accelerating frame, nor does an object with a non-zero net force obey F=ma when viewed from the perspective of that accelerating frame.
 

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