A) 6.25 N-m
B) 12.50 N-m
C) 18.75 N-m
D) 25.00 N-m
Correct Answer: C
Solution :
\[W=\frac{1}{2}k(x_{2}^{2}-x_{1}^{2})=\frac{1}{2}\times 5\times {{10}^{3}}({{10}^{2}}-{{5}^{2}})\times {{10}^{-4}}\] \[=18.75\,J\]
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