ta có
\(l_{01}=0,6m\)
\(l_{02}=0,4m\)
R=0,01m
l=l1+l2+R=0,5m
\(\Rightarrow l_1=0,49-l_2\)
cả hai lò xo đều bị nén
khi hệ cân bằng
\(F_{đh1}=F_{đh2}\Leftrightarrow k_1.\left(l_{01}-l_1\right)=k_2.\left(l_{02}-l_2\right)\)
\(\Leftrightarrow k_1.\left(l_{01}-0,49+l_2\right)=k_2.\left(l_{02}-l_2\right)\)
\(\Rightarrow l_2=\)0,23m\(\Rightarrow\Delta l_2=0,17m\)
thay l2=0,23\(\Rightarrow l_1=\)0,26m
\(\Rightarrow\Delta l_1=0,34m\)