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A uniform disc of mass M and radius R is...

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 upward

B

its linear acceleration is g downward

C

its angular acceleration is `(2g)/(R)`

D

its rate of change of angular momentum is `MgR`

Text Solution

Verified by Experts

The correct Answer is:
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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