Mass (kg) x Gravitational Field Strength (Gravity) (N/kg) = Weight (N)
GFS on earth = 10 N/kg
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Weight is an objects mass times the gravitational acceleration it undergoes. For a 5.0kg mass this would be 49N which equals 11.02 pounds.
In the metric system (really called SI) weight is measured in units of newtons (lower case n to emphasize we are not talking about the scientist) and mass is in units of kilograms. W = mg (g =9.8) so weight in newtons equals mass in kilograms times 9.8.
Mass / Volume = Density (/ Means Divided by)
Weight is mass times acceleration due to gravity.
Because mass is not the same as weight. Weight is mass times gravity so your weight will change if you are on the earth or moon but your mass will stay the same.