Odpowiedzi

2010-03-03T16:15:57+01:00
P=12000W
W=30J
P=W/t
12000=30/t
12000t=30
t=0,0025 s
2010-03-03T16:16:42+01:00
1.p=12000W
W=30J
P=W/t
12000=30/t
12000t=30
t=0,0025 s

2.F=500N
s=60km=60000m
t=2h=120min=7200s
W=F x s
W=500 x 60000
W=30000000J
P=W/t
P=30000000/7200
P~4200W