A) 1.5 s
B) 2 s
C) 0.5 s
D) 1 s
E) 2.5 s
Correct Answer: B
Solution :
Moment of inertia \[=3\times {{10}^{2}}kg-{{m}^{2}}\] Angular speed \[\omega =4.6\text{ }rad/s\] Torque \[\tau =6.9\,\times {{10}^{2}}\,Nm\] \[\tau =I\alpha =I\times \frac{\omega }{t}\] \[6.9\times {{10}^{2}}=3\times {{10}^{2}}\times \frac{4.6}{t}\] Or \[t=\frac{3\times {{10}^{2}}\times 4.6}{6.9\times {{10}^{2}}}\] \[=2s\]You need to login to perform this action.
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