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A cuboid of height 10 cm, width 5 cm and 8 kg is kept on a rough horizontal ground as shown . The ground is so rough that we can assume that the questions indicated below. A boy applies a horizontal force F at the top edge of the cuboid. IF the force applied is 2F, what is the initial angular acceleration of the cuboid ?A. `60 rad//s^(2)`B. `30 rad//s^(2)`C. `15 rad//s^(2)`D. `240 rad//s^(2)` |
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Answer» Correct Answer - A `Fxx0.1-mgxx0.05/2=Ialpha` `I=M/3(omega^(2)+h^(2))=8/3(25/(10^(4))+100/(10^(4)))` `=1/30 kg-m^(2)` `L=(4-80xx1//40)/(1//30) =60 rad//s^(2)` |
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