A) 8 cm/s
B) 12 cm/s
C) 4 cm/s
D) 6 m/s
Correct Answer: D
Solution :
\[v=\omega \sqrt{{{a}^{2}}-{{x}^{2}}}\] \[=\,\,\,\frac{2\pi }{T}\sqrt{{{a}^{2}}-{{x}^{2}}}\,\,=\,\,\frac{2\,\,\times \,\,3}{3}\sqrt{25-16}\,\,=\,\,6\,cm/s\]
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