WEBVTT

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Here is the problem: What is the weight of a 45 kg object on Earth (g equals 9.81 m/s squared)?

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Use the weight formula, rearranged for the unknown, in SI units.

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Formula: weight.

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Substitute the known values.

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So the answer is weight W equals 441.45 N.

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Weight is the gravitational force on a mass: W equals mg, with g approximately 9.81 m/s squared near Earth prime s surface (1.62 m/s squared on the Moon). Mass in kilograms does not change from place to place; weight in newtons does.

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Substituted every value back into the formula: both sides agree, which checks out.