A steel strip of length, $L=200 \mathrm{~mm}$ is fixed at end $A$ and rests at $B$ on a vertical spring of stiffness, $k=2 \mathrm{~N} / \mathrm{mm}$. The steel strip is $5 \mathrm{~mm}$ wide and $10 \mathrm{~mm}$ thick. A vertical load, $P=50 \mathrm{~N}$ is applied at $B$, as shown in the figure. Considering $E=200 \mathrm{GPa}$, the force (in $\mathrm{N}$ ) developed in the spring is

A steel strip of length, $L=200 \mathrm{~mm}$ is fixed at end $A$ and rests at $B$ on a vertical spring of stiffness, $k=2 \mathrm{~N} / \mathrm{mm}$. The steel strip is $5 \mathrm{~mm}$ wide and $10 \mathrm{~mm}$ thick. A vertical load, $P=50 \mathrm{~N}$ is applied at $B$, as shown in the figure. Considering $E=200 \mathrm{GPa}$, the force (in $\mathrm{N}$ ) developed in the spring is

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