Odpowiedzi

2009-12-01T15:26:58+01:00
P=w/t
p=m*g*s/t
p=100*10*10/20
p=10000/20
p=5000 [W]
2009-12-01T15:27:22+01:00
Dane:
m = 100 kg
h=s= 10 m
t = 20s
SZukane:
P=?

P= W/t
W= F*s
W=Ep= m*g*h
W= 100 kg*10m/s2*10m
W= 10 000 J
P= 10 000 J : 20s
P = 500 W
2009-12-01T15:37:36+01:00
Dane: Szukane:
m = 100 kg P = ?
h= s = 10 m
t = 20s

P= W/t
W= F*s
W=Ep= m*g*h
W= 100 kg*10m/s2*10m
W= 10 000 J
P= 10 000 J : 20s
P = 500 W