Odpowiedzi

2010-01-20T15:29:23+01:00
Dane:
m = 1800 kg
t = 27s
U = 380 V
I = 20A
Szukane: s
Rozw.:
P = U×I = 380 V × 20 A = 7600 W
P = W/t
W = F × s
F = m×g
czyli
P = F × s / t
P = m × g × s / t
P × t = m × g × s
s = P × t / m × g = 7600 W × 27 s / 1800 kg × 10 [m/s²] = 11,4 m