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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.
@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!
@lucifargundam No, the weight would do the opposite, weight would go down, mass would go up.