Odpowiedź :
Dane:
Ep = W
W = 520J
h = 150cm = 1,5m
g = 10m/s²
Szukane:
m = ?
Wzór:
[tex]W = mgh | \div gh \\ m = \frac{W}{gh} [/tex]
Obliczenia:
[tex]m = \frac{520}{10 \times 1.5} = \frac{520}{15} \approx34kg[/tex]
Odpowiedź: Mariola waży około 34 kg
[tex]Dane:\\W = 520 \ J\\h = 150 \ cm = 1,5 \ m\\g = 10\frac{N}{kg}\\Szukane:\\m = ?\\\\Rozwiazanie\\\\W =E_{p} = mgh\\\\mgh = W \ \ /:gh\\\\m = \frac{W}{gh}\\\\m = \frac{520 \ J}{10\frac{N}{kg}\cdot1,5 \ m} = \frac{520 \ N\cdot m}{10\frac{N}{kg}\cdot1,5 \ m}\\\\m =34,(6) \ kg\\\\\boxed{m \approx34,67 \ kg}[/tex]