The parent was asking which laws are not constructs, and your example I don't think works as an answer to that question. In what sense do you "have" that physical object? For example, what does it mean to say "I have a phone"? "Having" in that sense is a construct, not a natural thing. You might be holding the phone, you might put it down, I might hold it while you are holding it, I might pick it up when you put it down, I might look at it while you aren't, etc. But there's nothing in any of those real natural world descriptions that correspond to having, until you start to include our social constructs around possession.