Odpowiedzi

2009-11-11T21:13:05+01:00
W=F×s = m×g×h = 300N
P=W/t = 200/2=150W
2009-11-11T21:25:26+01:00
P = W/t
W= F*s
F=m*g wiec
W= m* g * s
W = 10 * 10 * 3 = 300J

P = 300J / 2s = 150W
2009-11-11T21:45:52+01:00
Dane :
m = 10 kg
h = 3 m
t = 2 s
g = 10 m/s²

Szukane :
W , P

W = Fh
F = mg
F = 10 * 10[kg * m/s² = N]
F = 100N
W = 100 * 3[N * m = J]
W = 300 J

P = W/t
P = 300 / 2 [ J / s = W]
p = 150 W