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Unformatted text preview: due to the Earth's gravity. In the metric system there is no confusion of terms. A kilogram is a quantity of mass and a newton is a quantity of force . One kilogram (kg) = 2.205 pounds of mass and 4.45 newtons (N) = 1 pound of force. If someone uses ``pounds'', be sure you understand if s/he means force or mass! How do you do that? To find something's weight in newtons, you multiply the mass in kilograms by the acceleration of gravity in the units of meters/seconds 2 . For example: Joe Average has a mass of 63.5 kg and he feels a force of gravity on the Earth = 63.5 kg 9.8 m/s 2 = 623 kg m/s 2 = 623 N. His weight is 623 N. The other value in the preceding equation, 9.8 m/s 2 , is the acceleration due to gravity close to the Earth's surface. Joe Average's weight at other places in the universe will be different but his mass will remain the same....
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.
 Fall '10
 EmilyHoward
 Astronomy

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