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The weight of 120g of mass, on or near the earth's surface, is (0.12 x 9.8) = 1.18 newtons (rounded)

It would be about 0.2 newton on the surface of the moon.

In a spacecraft moving at a constant speed, the same 120g would weigh zero.

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14y ago
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11y ago

Note that most babies are born with more than 1200 grams. Convert the grams to kilograms, and then - assuming normal Earth gravity - multiply the number of kilograms by 9.8 to get the weight in newton.

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Q: What is the weight of a person whose mass is 1200 g?
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