Odpowiedzi

2009-11-06T16:39:34+01:00
F1 = Q = 10*400 = 4000N
S1 = 80
F2 = 150N
S2 = x

F1/S1 = F2/S2
F1 * S2 = F2 * S1

4000x = 12000
x = 3cm^2