You are only testing and measuring one factor with regards to the speed of light.
In economics you are making a hypothesis based on a sample (econometrics) that does not actually show you what all the variables could be. If I increase the price of bananas and households substitute something else for bananas, I don't know if that is apples, oranges, kiwifruit, blueberries or the household simply stopped buying fruit. I would have to count all the alternatives, rather than simply ask a demand curve question about bananas.
I think that physics has basic fixed rules which narrows the alternatives to combinations, whereas economics is both evolving and has no fixed combination rules.
I now have to be more careful because, as physics and economics are very different fields, common words have very different meanings in the different fields. "elasticity" is a good example.
(I'm a semi retired entertainment tax lawyer with an economics background)
Economics has basic fixed rules also, that humans wants to have fun.
What does this mean? That humans try to avoid doing what is not fun when they can.
This has implications for their behavior, and their behavior for their actions, and their actions for the economy.
These implications are not changing throughout human history, for example if something is too expensive for someone, then usually that someone tries to look for other options, because this is what is fun for that someone, but also for most humans.
And only because humans don't think it is fun to pay more than you should for something, they usually want to pay less.
But for the few privileged humans they want to pay more for something than it costs, as this way others won't have the money to buy it. This is what luxury or exclusive products are, when status is part of the deal.
In short humans can go many ways when it comes to their behavior, what is common about their behavior is that people are trying to have fun in their lives, when the fun they have is common they have cooperation, when it is not they have conflict.
Some humans enjoy labeling conflict as competition, so let me explain what I mean.
When you have conflict, you want to be better than someone else, and this someone else to accept that.
When you have competition, you want to be better than no one else but yourself, and you don't care what this someone else thinks, you just have the patience to get better.