Yes, and no.
The bug is flying at a groundspeed of 60, since the car and everything in it is travelling at 60.
However the bugs’ airspeed is much lower, because (as long as your windows are closed) the air in the car is also moving at 60, the bug is flying at a regular speed through the air.
Basically the bug doesn’t have to fly at 60 to keep up, because the air it’s flying in is already going 60.
Exactly the same way you’re sitting still and not moving at all, but are going 60 with the car
There is no universal objective speed. Speed is relative to the observer. If you’re in the car with the bug, its speed is not 60mph. Its just moving at whatever normal bug speed relative to you.
If someone was observing the entire moving car, then yes the bug would look like its moving at 60mph, though it would be facetious to say its *flying* at 60mph since the car is providing the motion.
Speed is always relative. So the bug is flying at 60mph relative to the road, but not relative to the car. You could also ask if the car is driving at 19 miles per second, as that’s how fast the earth is orbiting the sun. You can expound from there because the sun isn’t stationary in space.
We generally just express speeds in the most useful context for the circumstance.
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