Odpowiedzi

2010-03-05T15:16:31+01:00
F = 40 N
s = 250 cm = 2,5 m
A - praca
A = F*s* cos α
ale α = 0⁰ ( ruch poziomy ) więc cos α = 1
mamy zatem
A = F *s = 40 N * 2,5 m = 100 J
Pominięto tarcie .
2010-03-05T15:17:17+01:00
W = Fs
F = 40N
s= 2,5m
W = 40N*2,5m = 100J
2010-03-05T15:21:01+01:00
F- 40 N
s - 250 cm = 2,5m
w - ?
w = f * s
w = 40 N * 2,5m
w = 100 J