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P = 12000W
W = 30J
Szukane:
t = ?
P = W:t
t = W:P
t = 30 : 12000
t = 0,0025 s
P=12kW=12000W t=?
W=30J
wzór: t=W/P
t=30J/12000W
t=0,0025s
1 kW = 1000W
P = 12kW = 12000W
W = 30J
szukane ;
t = ?
P = W/t
W = P * t / : P
t = W/P
t = 30J : 12000 W
t = 0,0025 s
odp; silnik wykonal prace 30 J w czasie 0,0025 s.