Question

K1=K2: F1=2kilo/N: deltaL1=5cm; deltaL2=7cm. Sa se afle F2. PLS dau coroana

Answer 1

Se dă:
[tex] k_{1}=k_ {2} [/tex]
[tex] F_{1}=2 N[/tex]
Λ$l{1}$=5 cm = 0,05 mΛ$l{2}$=7 cm = 0,07 m
_______________________________
$F_{2}$-?

Re-re:
    $F_{e2}=k Λ<strong>l</strong>_{2}$
$F_{e1}= kΛ<strong>l</strong>_{1}$
k=$\frac{F_{e1} }{ Λ<strong>l</strong>_{1} }=$$\frac{2}{0,05}=40N/Kg$ 
 $F_{e2}=k Λ<strong>l</strong>_{2}=40 · 0,07= 2,8 N/Kg$