Ile wyniesie praca jesli moc wynosi 2W a czas 10 minut

P = 2 W = 2 J/s t = 100 min = 10 *60 s = 600 s W = ? [latex]P = frac{W}{t} /* t [/latex] [latex]W = P * t [/latex] [latex]W = 2 frac{J}{s} * 600 s = 1200 J[/latex]

dane: P = 2 W = 2 J/s t = 10 min = 10 ·60s = 600 s szukane: W = ? P = W/t    |·t W = P · t W = 2 J/s · 600 s W = 1 200 J = 1,2 kJ  Odp. Praca wyniesie 1 200 J  (1,2 kJ).