Zad. 1.
t = 1 min = 60 s
W = 120 kJ = 120 000 J
P = W / t = 2000 W = 2 kW
Zad. 3.
F = 5 kN = 5000 N
v = 0,5 m/s
P = W / t
W = F * s
P = (F * s) / t
v = s / t
s = v * t
P = (F * v * t) / t
t się skraca
P = F * v = 5000 * 0,5 = 2500 W = 2,5 kW
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Zad. 1.
t = 1 min = 60 s
W = 120 kJ = 120 000 J
P = W / t = 2000 W = 2 kW
Zad. 3.
F = 5 kN = 5000 N
v = 0,5 m/s
P = W / t
W = F * s
P = (F * s) / t
v = s / t
s = v * t
P = (F * v * t) / t
t się skraca
P = F * v = 5000 * 0,5 = 2500 W = 2,5 kW