The moment of inertia of a disc about its geometrical axis is I. then its M.I. about its diameter will be

  • Option 1)

    I

  • Option 2)

    2I

  • Option 3)

    \frac{I}{2}

  • Option 4)

    \frac{I}{4}

 

Answers (1)
V Vakul

 

Moment of inertia for system of particle -

I= m_{1}r_{1}^{2}+m_{2}r_{2}^{2}+.........m_{n}r_{n}^{2}

\dpi{100} = \sum_{i=1}^{n}\: m_{i}r_{i}^{2}

 

- wherein

Applied when masses are placed discretely.

 

 


Option 1)

I

Incorrect

Option 2)

2I

Incorrect

Option 3)

\frac{I}{2}

correct

Option 4)

\frac{I}{4}

Incorrect

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