For most of us standing on the bathroom scale, 1 kilgram = 2.2 pounds. But the relationship between kg and lbs is not that simple.
The kilogram is actually a metric unit of mass, whereas the pound is an english unit of force. They are related by one of Newton's laws: Force equals Mass times Acceleration, or F=(M)(A).
Mass is a measure of an item's resistance to change in direction (inertia), whereas force is the amount of push the item exerts on something else in a given situation. The english and metric systems both have units of mass (grams, slugs) and force (newtons, pounds) but unless you're a physics student you'll only recognize the common units: kg and lbs.
The difference is this: an 80 kg person has 80 kg of mass regardless of whether he's standing on a scale, sitting in a chair, falling off a building, going around a corner in a car, or bottoming out in a roller coaster. Standing on a bathroom scale, that 80kg person exerts about 176 lbs force on the scale. Any of us can feel, however, that the force we exert on a chair/seat/car is very different in dynamic situations like going around corners or going up & down roller coaster tracks. We feel heavier (more force) when we bottom out in the roller coaster. If we were sitting on a scale in the coaster car we would see the weight go from near zero when topping a hill to well past 300 lbs at the bottom of the dip. Our mass did not change but the force we exerted on the scale (and coaster car) did. That's the difference in mass and force, caused by different accelerations. Going to extremes, 80 kg will never kill us; but the 2,500 pound smack from a head on collision might when we hit the dashboard with our 80 kg of mass.
Our weight (force, pounds) would also change if we went to a different planet due to the different gravitational acceleration - but the 80 kg would remain 80 kg. Enough nerdy physics for now (yes that was my BS degree).
2006-12-24 19:06:12
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answer #2
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answered by bobo383 3
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They both weigh stuff I guess but the kilogram weighs 2 times more than the pound:)
2016-05-23 05:17:19
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answer #3
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answered by Anonymous
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1 pound = 0.453 592 37 kilogram. I've no idea what the relation between them is. Could you clarify please? Thank you.
2006-12-24 18:44:53
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answer #4
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answered by tattyhead65 4
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