A) 16 J
B) 8 J
C) 32 J
D) 24 J
Correct Answer: B
Solution :
\[W=\frac{1}{2}k(x_{2}^{2}-x_{1}^{2})=\frac{1}{2}\times 800\times ({{15}^{2}}-{{5}^{2}})\times {{10}^{-4}}\]\[=8\,J\]
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