if a bug is flying around your car while you’re driving 60mph on the highway, is the bug flying at 60mph?
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Speed is relative to the observer. To someone standing beside the highway, the car and everything in it are at 60mph. To someone in the car, the fly is flying at its normal speed.
If you’re doing 60 and someone is approaching you at 60, the relative speed to each other is 120mph.
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