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energia = 1,2 kJ = 1200 J
Szukane: prędkość = ?
Energia = ½m*v²|:½m
v² = 1200J:½*600kg
v² = 1200J:300kg
v² = 4m/s
v² = √4m/s = 2m/s
Odpowiedź: Pojazd o masie 0,6t posiada prędkość 2m/s