Odpowiedź :
Odpowiedź:
F1=4800N
F2=0,16kN=160N
S2=80cm²
F1/S1=F2/S2
S1=F1*S2/F2
S1=4800N*80cm²/160N
S1=2400cm²
odp B
[tex]Dane:\\F_2 = 4 \ 800 \ N\\F_1 = 0,16 \ kN = 160 \ N\\S_1 = 80 \ cm^{2}\\Szukane:\\S_2 = ?\\\\\\\frac{F_1}{S_1} = \frac{F_2}{S_2}\\\\F_1\cdot S_2 = F_2\cdot S_1 \ \ /:F_1\\\\S_2 = \frac{F_2}{F_1}\cdot S_1\\\\S_2 = \frac{4800 \ N}{160 \ N}\cdot80 \ cm^{2}}\\\\S_2 = 30\cdot80 \ cm^{2}\\\\\boxed{S_2 = 2 \ 400 \ cm^{2}}[/tex]
Odp. b)