Odpowiedzi

2010-03-30T15:17:28+02:00
V=20 km/h
m=20 kg
s=760 m = 0,76 km
g= 10 m/s²

F = m * g
F = 200 * 10
F = 2000 N

W = F * s
W = 2000 * 0,76
W = 1520 J

P = W / t

V = s/t
t = s/V
t = 0,76 * 20
t = 15,2 h

P = W/t
P = 1520 * 15,2
P = 23704 W