Why do observers in different reference frames disagree about the length of an object? Because moving objects are stretched by forces which make them move. Because clocks in moving frames are less accurate than clocks at rest. Because moving objects get compressed to greater density by acceleration. Because they disagree about the time of events which define the ends of the object.
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Why do observers in different reference frames disagree about the length of an object? Because moving objects are stretched by forces which make them move. Because clocks in moving frames are less accurate than clocks at rest. Because moving objects get compressed to greater density by acceleration. Because they disagree about the time of events which define the ends of the object.