A) \[\pi \]
B) 2\[\pi \]
C) 4\[\pi \]
D) 8\[\pi \]
Correct Answer: A
Solution :
\[T=2\pi \sqrt{\frac{m}{k}}\] \[=2\pi \sqrt{\frac{2.5}{10}}\] \[=2\pi \sqrt{\frac{1}{4}}\] \[=\pi \]
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