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In which of the following cases, the moment of inertial is greater than 0.005 kg `-m^(2)`A. a disc of mass 0.3 kg, radius 0.2 m about its diameter.B. a cylinder of mass 0.2 kg and radius 0.3 m about its axis.C. a sphere of mass 0.1 kg radius 0.2 m about it tangent.D. a rod of mass 0.2 kg and length 0.3m about it end. |
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Answer» Correct Answer - BCD `I_(1)=1/4 mr^(2)=1/4xx0.3xx(0.2)^(2)=0.003 kg -m^(2)` `I_(2)=1/2 xx0.2xx(0.3)^(2)=0.009 kg -m^(2)` `I_(3)=2/5 xx0.1xx(0.2)^(2)+0.1xx(0.2)^(2)` `I_(4)=1/3 xx0.2xx(0.3)^(2)` `=0.2xx0.3xx0.03 =0.006 kg m^(2)` |
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