Newton's first law is often stated "A body in motion tends to stay in motion and a body at rest tends to stay a rest, unless acted upon by an external force."
In consideration of the small scale cosmological considerations this seems a rather pointless observation in that everything is always in motion (there is no rest, ever, period) and everything is always being acted upon by external forces (there is nowhere to go in the real universe to avoid forces).
Perhaps it could be said as "Force changes the motion of a body" to remove the moot elements. I wonder why it is not said this way?
1 week ago