Conceptually I understand that mass is a measure of the amount of stuff present in an object, while weight is a measure of the force of gravity applied to that object. An object of a given mass will have a bigger weight on Earth than on the moon because Earth’s gravity is stronger. But… mass is determined by weighing an object on a scale. And there is a simple mathematical conversion between grams (mass) and pounds (weight), implying that they’re just different units for the same concept. So what gives? (Also this is a question that applies to so many fields, I had no idea which flair to apply.)
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Image you’re at a gym on Mars: It’s a lot harder to fall on the floor and hurt yourself, because your **weight** is less. But if you were to run into a brick wall full speed, it’d knock the shit out of you, because your **mass** is the same.
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