Odpowiedź :
[tex]dane:\\m = 100 \ kg\\h = 5 \ m\\t = 20 \ s\\g = 10\frac{N}{kg}\\szukane:\\P = ?\\\\Rozwiazanie\\\\P = \frac{W}{t}\\\\W = E_{p} = mgh\\\\W = 100 \ kg\times10\frac{N}{kg}\times5 \ m = 5 \ 000 \ J\\\\P = \frac{5000 \ J}{20 \ s} = 250 \ W[/tex]
Odp. Moc tego silnika P = 250 W.