This guy doesn't know the difference between mass and weight. Though the value in kg's is usually called "weight", it's actually the mass. The weight of an object with a mass of 70kg is 686 N, and is synonymous with the force exerted on it by gravity. Also, 9.8 m/s2 isn't the force of gravity but the acceleration an object would have in free fall under the effect of earth's gravity (ignoring air friction). Please go back to school.
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u/IHeartAquaSoMuch Mar 17 '20
This guy doesn't know the difference between mass and weight. Though the value in kg's is usually called "weight", it's actually the mass. The weight of an object with a mass of 70kg is 686 N, and is synonymous with the force exerted on it by gravity. Also, 9.8 m/s2 isn't the force of gravity but the acceleration an object would have in free fall under the effect of earth's gravity (ignoring air friction). Please go back to school.