A) \[120mm/se{{c}^{-1}}\]
B) \[133mm/se{{c}^{-1}}\]
C) \[155mm/se{{c}^{-1}}\]
D) \[12mm/se{{c}^{-1}}\]
Correct Answer: B
Solution :
From the formula, velocity in SHM is given by \[V=\omega \sqrt{{{a}^{2}}-{{y}^{2}}}\] Here, \[\omega =2\text{ }rad/sec.\text{ }y=20mm,\] \[a=60mm,\,V=?\] \[\Rightarrow \] \[V=2\sqrt{{{(60)}^{2}}-{{(20)}^{2}}}\] \[\Rightarrow \] \[V=113mm/{{\sec }^{-1}}\]
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