A) \[20\pi s\]
B) \[2\pi \]
C) \[\frac{2\pi }{10}s\]
D) \[200\pi \,s\]
Correct Answer: C
Solution :
\[T=2\pi \sqrt{\frac{l}{g}}\] \[=2\pi \sqrt{\frac{9.8}{980}}\] \[=2\pi \sqrt{\frac{1}{100}}\] \[=\frac{2\pi }{10}s\]
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