A) \[850\text{ }cm/{{s}^{2}}\]
B) \[996\text{ }cm/se{{c}^{2}}\]
C) \[720\text{ }cm/{{s}^{2}}\]
D) \[650\text{ }cm/se{{c}^{2}}\]
Correct Answer: B
Solution :
Time period \[=\frac{No.\text{ }of\text{ }revolutions}{time}=\frac{25}{14}=1.79sec\] Now angular speed \[\omega =\frac{2\pi }{T}=\frac{2\times 3.14}{1.79}=3.51rad/\sec \] Now magnitude of acceleration is given by \[a={{\omega }^{2}}l={{(3.15)}^{2}}\times 80\] \[=985.6cm/{{\sec }^{2}}\] \[=996cm/{{\sec }^{2}}\]
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