User talk:207.191.189.130

If you're a person with a mass of 80kg, Earth's gravity pulls you with a force of 800 newtons (on Earth, your weight in newtons is always roughly 10 times your mass in kilograms, because Earth pulls on every kilogram of mass with a force of 10 newtons). Strictly speaking, we should weigh things in units of force (newtons), so if your mass is 80kg, your weight is really 800 newtons. But in everyday speak, we tend to confuse mass and weight and talk about weights in kilograms (or pounds) instead. By the same token, although the kilogram is a unit of mass, not force, it's okay to talk about a force equivalent to a given mass because all masses generally convert to forces in the same way. You can read more about this in our article on weights and balances.