Odpowiedź :
[tex]Dane:\\m = 3 \ kg\\\Delta h = 1,5 \ m\\g = 10\frac{m}{s^{2}} = 10\frac{N}{kg}\\Szukane:\\\Delta E_{p} = ?\\\\\\\Delta E_{p} = m\cdot g\cdot \Delta h\\\\\Delta E_{p} =3 \ kg\cdot10\frac{N}{kg}\cdot1,5 \ m\\\\\boxed{\Delta E_{p} = 45 \ J}[/tex]