The Earth weight of a particular substance in newtons is the product of its mass (in kg) and 9.8 meters per second per second, following this conclusion we shall get the mass of a substance if we divide its weight by 9.8 . Therefore applying this theory the mass of the book must or would be 0.51 kg.
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On Earth, 1,500 kg of mass weighs 14,710 newtons.
On earth, a mass of 5.306 kilograms weighs 52 newtons. That's some baseball ! More like a bowling ball.
On the earth, any mass of 5 kg weighs 49 newtons(11 pounds).On the moon, the same mass weighs 8 newtons (1.8 pounds).
On Earth, 6 kg of mass weighs 58.84 newtons. (rounded)
On earth, 1 kilogram of mass weighs 9.8 newtons.