What are inertial and non-inertial forces? I looked them up. One of the websites says that an inertial force is a force that can be observed/measured in an inertial frame. In this case, do we have a Force that we can't observe or measure in an inertial frame? Aren't forces frame independent?
The website also says, "A non-inertial force is what is called a fictitious force that appears when you’re measuring things in a non-inertial frame of reference." Is that it? Non-inertial forces are basically pseudo forces that we use in non-inertial reference frames?