Yes, exactly that. It's impossible for us humans to detect with our senses that, sitting on the Earth's surface, we're in a non-inertial reference frame -- we need indirect means to detect it (e.g., run an experiment). Therefore its outside of our normal everyday experiences. It would be a great deal of fun to be on a large rotating space station, as that would afford one with the ability to do experiments that showed one was in a non-inertial frame of reference. For example, if you were to throw a ball, it would appear to you in the space station that its trajectory was curved. You'd account for this with a force because you'd still want Newton's second law of motion to be satisfied so you could use it to make predictions. However, if you were to view the same event from an external non-rotating frame of reference, you'd see that the ball traveled along a straight line, just as would be predicted by Newton's second law saying \(m \ddot a = 0\). In the inertial frame, you as the observer would see that in fact it was the observer (the "first" you) that actually rotated under the ball. And that, of course, also takes a force to accomplish; we call it the centripetal force and it's definitely not a fictitious force.someonesdad,
Thanks for the link. It says " The surface of the earth is a rotating frame of reference". We live in the planet earth. So when i sit on a railway platform(say), does it mean , i am in rotating frame of reference, aka, non inertial frame of reference.
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