What are non-inertial frames?

A non-inertial frame is like being on a merry-go-round, you feel pulled or pushed even though nothing’s touching you.

Imagine you're sitting in a car that suddenly speeds up. You feel like you're being pushed back into your seat, even though no one touched you. That's what happens in a non-inertial frame, it’s a special kind of viewpoint where things seem to move or change direction on their own, even if nothing is actually touching them.

In a regular inertial frame, like sitting still on the floor, you don’t feel any extra forces unless something touches you. But in a non-inertial frame, like being on a spinning ride or in an accelerating car, you feel fake forces, like being pushed or pulled, even when nothing is touching you.

These fake forces can be confusing! For example, if you're on a merry-go-round, it might look like everything around you is moving backward, even though you are the one spinning. That’s how non-inertial frames work, they make things seem different than they really are, just like how being in a moving car can make you feel like the world is zooming past you! A non-inertial frame is like being on a merry-go-round, you feel pulled or pushed even though nothing’s touching you.

Imagine you're sitting in a car that suddenly speeds up. You feel like you're being pushed back into your seat, even though no one touched you. That's what happens in a non-inertial frame, it’s a special kind of viewpoint where things seem to move or change direction on their own, even if nothing is actually touching them.