Odpowiedzi

2009-12-26T17:55:41+01:00
M = 60 kg
h = 2 m
α = 45*
ƒ = 0,2
W = F • l
l = h / sin α
F = Fs + T
Fs = sin α • Q
T = ƒ • Fn
Fn = cos α • Q
T = ƒ • cos α • Q
F = sin α • Q + ƒ • cos α • Q
W = (sin α • Q + ƒ • cos α • Q) • (h / sin α)
W = Q • h + [(ƒ • cos α • Q • h) / (sin α)]
W = m • g • h • [1 + (ƒ • cos α) / (sin α)]
W = 60 • 10 • 2 • [1 + (0,2 • cos 45*) / (sin 45*)]
cos 45* = sin 45*
W = 1 440 J
1 5 1