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Weight vs mass — the article uses kg for weight?
Pedantic question: weight is a force (newtons), mass is kg. The program says "you weigh 30 kg on Mars".
Pedantic question: weight is a force (newtons), mass is kg. The program says "you weigh 30 kg on Mars".
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You're technically right. In everyday language people say "weigh X kg", meaning "a scale on Earth would show X kg". On Mars a scale calibrated for Earth would show about 38% of your Earth reading, which is what the program calculates.
A physics-correct version would print newtons:
mass * g_planet.Fair, the everyday meaning is what most people want. Maybe print both?
I added newtons as a second line. Nice little extension.
Pedantry appreciated 😄 Great way to learn the difference.