Mass: Difference between revisions
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<onlyinclude>'''Mass''' is a measure of how much [[matter]] is contained within an object. | <translate> | ||
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<onlyinclude>'''Mass''' is a measure of how much [[matter]] is contained within an object. Its [[SI]] unit is the '''[[kilogram]]'''. </onlyinclude> | |||
The mass of an object can be found by pushing on it with a known [[force]] | <!--T:2--> | ||
The mass of an object can be found by pushing on it with a known [[force]] ''F'' and dividing the size of that force by the resulting [[acceleration]] (''a'').<ref> Sears, Zemansky, and Young, ''Fifth Edition University Physics''. Addison-Wesley Publishing Company, 1979. </ref> | |||
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<math> m = \frac {F}{a} </math> | |||
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Mass is different from weight ([[force]]) in that its value does not change if [[gravity]] changes. For example, on Earth, where the [[acceleration due to gravity]] is 9.8 [[meter|m]]/[[second|s]]<sup>2</sup>, a person who has 60 [[kilogram|kg]] of mass weighs 588 [[Newton]]s (132 [[lb]]s). On the moon, where the acceleration due to gravity is about 1/6 of what it is on Earth, that same 60 kg person weighs just 98 Newtons (~22 lbs). | Mass is different from weight ([[force]]) in that its value does not change if [[gravity]] changes. For example, on Earth, where the [[acceleration due to gravity]] is 9.8 [[meter|m]]/[[second|s]]<sup>2</sup>, a person who has 60 [[kilogram|kg]] of mass weighs 588 [[Newton]]s (132 [[lb]]s). On the moon, where the acceleration due to gravity is about 1/6 of what it is on Earth, that same 60 kg person weighs just 98 Newtons (~22 lbs). | ||
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To read more about the SI unit of mass, the kilogram, click [http://www.unc.edu/~rowlett/units/dictK.html#kilogram here]. | To read more about the SI unit of mass, the kilogram, click [http://www.unc.edu/~rowlett/units/dictK.html#kilogram here]. | ||
==References== | ==References== <!--T:6--> | ||
{{reflist}} | {{reflist}} | ||
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Revision as of 15:57, 28 July 2017
<translate> Mass is a measure of how much matter is contained within an object. Its SI unit is the kilogram.
The mass of an object can be found by pushing on it with a known force F and dividing the size of that force by the resulting acceleration (a).[1]
Mass is different from weight (force) in that its value does not change if gravity changes. For example, on Earth, where the acceleration due to gravity is 9.8 m/s2, a person who has 60 kg of mass weighs 588 Newtons (132 lbs). On the moon, where the acceleration due to gravity is about 1/6 of what it is on Earth, that same 60 kg person weighs just 98 Newtons (~22 lbs).
To read more about the SI unit of mass, the kilogram, click here.
References
- ↑ Sears, Zemansky, and Young, Fifth Edition University Physics. Addison-Wesley Publishing Company, 1979.
</translate> <languages />