(a) A book has a mass 400 g. Find its weight when taken from the surface to a height equal to the radius of the earth.
(b) Define weight.
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Mass is 400 gm that is 0.4 kg.
weight is mass x gravity
w=0.4 x 9.8
w = 3.92 N
weight - body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.
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Weight : The force exerted on an object due to the acceleration of gravity.
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