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Interesting fact of the day. As you lift a rock into the air it actually **increases** its overall mass. Though the increase is so small you'd never notice it.
@stunder Mass-energy equivalence. You are putting (potential) energy into the stone. That energy adds to the mass of the object.
Similarly if you charge a batter you arent adding anything Physical to the battery, it has all the same number of electrons, protons, and neutrons it did before just rearranged. Yet charging a battery would likely increase its mass every so slightly.
This is Mur 
@freemo
Though in reality I think the mass decreases as microparticles, organisms, etc fall off the rock when we lift it
@mur2501 yes, though im not sure id count those as part of the mass of the rock... Plus its hard to say if that would be a net loss, it could also pickup new particles as it moves through the air.
@freemo I think you're confusing mass with weight...
@lucifargundam No, the weight would do the opposite, weight would go down, mass would go up.
@lucifargundam @freemo
Here is a great video explaining it more.
https://youtu.be/Xo232kyTsO0
The principle works the same for a spring. Compress the spring and its mass increases!
@freemo how?