A) 16 J
B) 8 J
C) 32 J
D) 24 J
Correct Answer: B
Solution :
Work done, \[W=\frac{1}{2}k(x_{2}^{2}-x_{1}^{2})\] \[=\frac{1}{2}\times 800[{{(15\times {{10}^{-2}})}^{2}}-{{(5\times {{10}^{-2}})}^{2}}]\] \[W=400\times 200\times {{10}^{-4}}=8\,\,\text{J}\]
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