Respuesta :

ASIAX
Hi!

Speed is relative because when we measure speed we do so based on our position on the earth and not our position relative to space.
AL2006
You can read a book or take a nap sitting comfy in your soft chair in a passenger airliner flying 500 miles per hour.

What's your REAL speed ? Is it zero or is it 500 miles per hour ? It's both. It just depends on what the reference is.