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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 - A::C::D `(3Mg)/(2)+(mg)/(2)-Mg=Ma` `a=g uarr tau = I prop` `(3Mg)/(2)R-(Mg)/(2)R=(MR^(2))/(2) prop` `2Mg prop = (2g)/(R)rArr (dL)/(dt)=tau = MgR`. |
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