Odpowiedź :
[tex]F_{g} = m\cdot g \ \ /:g\\\\m = \frac{F_{g}}{g}\\\\\\a)\\F_{g} = 100 \ N\\g = 10\frac{N}{kg}\\\\m = \frac{100 \ N}{10\frac{N}{kg}}\\\\\boxed{m = 10 \ kg}[/tex]
[tex]b)\\F_{g} = 1 \ N\\g = 10\frac{N}{kg}\\\\m = \frac{1 \ N}{10\frac{N}{kg}}\\\\\boxed{m = 0,1 \ kg}[/tex]