Se da:
[tex]l=8cm=0,08m\\
k=270 \frac{N}{m} \\
x=51,2mm=0,0512m\\
g=10 \frac{N}{kg} \\
p=? \frac{kg}{m^{3} }\\
Formule:\\
Fel=k*x\\
m*g=k*x\\
V*p*g=k*x\\
l^{3}*p*g=k*x\\
p= \frac{k*x}{ l^{3}*g } \\
Calcule:\\
p= \frac{270*0,0512}{0,08^{3}*10} =2700 \frac{kg}{m^{3}} , aluminiu.[/tex]
