A uniform square plate has a small piece \(Q\) of an irregular shape removed and glued to the center of the plate leaving a hole behind in the figure. Then the moment of inertia about the \({z}\text -\)axis is:
                    

1. increased
2. decreased
3. the same
4. changed in an unpredictable manner
Subtopic:  Moment of Inertia |
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With reference to the figure of a cube of edge \(a\) and mass \(m,\) the following statements are given. (\(O\) is the centre of the cube).

    

Choose the correct statements:
(a) The moment of inertia of the cube about the \(z\)-axis is \(I_z=I_x+I_y\)
(b)  The moment of inertia of the cube about the \(z'\)-axis is \({I_z}'=I_z+\frac{{ma}^2}{2}\)
(c) The moment of inertia of the cube about \(z''\)-axis is = \(=I_z+\frac{{ma}^2}{2}\)
(d) \(I_x=I_y\)
Choose the correct option from the given options:
1. (a, c) 2. (a, d)
3. (b, d) 4. (b, c)
 

Subtopic:  Moment of Inertia |
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