This question stemmed from a conversation about measuring the speed of two very different objects. I realized that, unlike other measures that have their own units (length, mass, etc.), speed is measured using a ratio of distance and time. So I was wondering, does the size of the objects get factored into the measurement somehow? If speed is only ever measured using this distance/time approach (mph, for example), then wouldn’t the measure of speed become problematic since a large object is able to cover more distance than a small object?
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But a larger object wouldn’t cover more distance, they’re traveling at the same speed. Typically, you’d have a reference point that you measure. So you’d look at a specific point on the large object and use that to determine the speed.
But no, distance is an inherent part of speed.
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