Thor's Hammer

I seem to live in a family with younger males who like Avenger movies. I do a bit too. With one of the main characters being Thor, his hammer comes into play with any reference. How can he be worthy and lift this hammer when many others cannot. You can read the theory here…………………and some excerpts below.

“In the Avengers: Age of Ultron clip, Tony Stark speculates that there is a biosensor in the hammer’s shaft that recognizes when Thor has grasped Mjolnir. He is correct, in a sense—though it is not Thor’s fingerprints that the hammer is reading. Most likely it is taking some complex biological and psychological profile that calculates the “worthiness” of whoever is trying to lift the hammer. This is consistent with the scene in the clip where Steve Rogers (Captain America) is able to move the hammer (albeit slightly), while Tony Stark and Jim Rhodes, using thruster-assisted Iron Man and Iron Patriot gloves, are unable to budge Mjolnir at all. But if someone the hammer’s nanotechnology has determined to be “unworthy” tries to raise Mjolnir, how does it prevent itself from being moved?”

“Here the answer lies with Newton’s First Law of Motion, which states that an object at rest will remain at rest, if no net force acts upon it.”

“After all, they couldn’t put it in a comic book or Hollywood movie if it weren’t true!”