Răspuns:
a) [tex]G_{n} =50\sqrt{3} N[/tex] b) [tex]k=12500\frac{N}{m}[/tex]
Explicație:
a) [tex]Gn=Gcos(\alpha)=mgcos(\alpha)=10kg*10\frac{N}{kg} *cos(\frac{\pi}{6} )=50\sqrt{3} N[/tex]
b) [tex]F_{e}=G_{t}=mgsin(\alpha )=100N*sin(\frac{\pi}{6} )=50N[/tex]
[tex]F_{e}=k*\Delta l \Rightarrow k=\frac{F_{e}}{\Delta l} =\frac{50N}{y} =\frac{50N}{0.04m} =\frac{50000N}{4m}=12500N/m[/tex]