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A uniform disc of mass `M` and radius `R` is liffted using a string as shown in the figure. Then choose incorrect option(s), A. its linear acceleration is g upwardB. its linear acceleration is g downwardC. its angular acceleration is `(2g)/(R )` .D. its rate of change of angular momentum is `MgR` . |
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Answer» Correct Answer - B A uniform disc …………….. `(3Mg)/(2)+(Mg)/(2)-Mg=Ma` `a = g uarr` `tau = I alpha` `(3Mg)/(2)R -(Mg)/(2)R = (MR^(2))/(2).alpha` `2Mg alpha = (2g)/(R )` |
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