A) \[2\text{ }kg-{{m}^{2}}\]
B) \[1\text{ }kg-{{m}^{2}}\]
C) \[4\text{ }kg-{{m}^{2}}\]
D) \[8\text{ }kg-{{m}^{2}}\]
Correct Answer: A
Solution :
Given, \[r=0.4m,\] \[\alpha =8\,rad\,{{s}^{-1}},\] \[m=4kg,I=?\] Torque, \[\tau =I\alpha \] \[mgr=I.\alpha \] or \[4\times 10\times 0.4=I\times 8\] \[\Rightarrow \] \[I=\frac{16}{8}=2kg.{{m}^{2}}\] or \[I=2kg.{{m}^{2}}\]You need to login to perform this action.
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