This is from that epic "The Origin of the Justice League" in JUSTICE LEAGUE OF AMERICA# 9, February 1962. Written by Gardner Fox, art by Mike Sekowsky and Bernard Sachs. Now, Silver Age comics (even more than today) regarded the laws of physics as mere suggestions. You know. "Maybe you shouldn't create matter out of nothing, perhaps inertia would keep you from doing that." Here, as many times before and since, the Man of Steel throws textbooks out the window.
It may not be relevant, but we readers don't actually witness the events. It's a series of flashbacks told by the heroes to mascot Snapper Carr and newbie Green Arrow. Judging by Superman's slightly dodgy expression on the bottom left and by Snapper's reaction, maybe he's pulling everyone's leg just a bit...