Odpowiedzi

2009-11-12T17:32:29+01:00
F - 200kN
F_t - 50kN
V1 - 14 km/h = 3,(8)m/s
V2 - 50 km/h = 13,(8)m/s

Vw = V2 - V1 = 13,(8)m/s - 3,(8)m/s = 10m/s
F_w = F - F_t = 200Kn - 50 kN = 150 kN

a = F_w/m = 150 000 kg*m/s^2 : 1500 000 kg

a = o,1 m/s^2

t = Vw/a = 10m/s : 0,1 m/s^2

t = 100s

s = (a * t^2) : 2 = { 0,1 m/s^2 * (100s)^2 } : 2

s = 1000 m : 2

s = 500 m
20 3 20