Moment of Inertia

From a triangular lamina of side a and mass $m$ , a small triangular Lamina made by joining mid-points of sides of triangular lamina is cut. If Moment of Inertia of complete Lamina about COM is $I_o$ and Moment of Inertia of remaining Lamina about centroid is $\frac{x{I}_0}{16}$, then find the value of $x$.

Four point masses $($each of mass $m$$)$ are arranged in the $X-Y$ plane. The moment of inertia of this array of masses about $Y$-axis is 

M.O.I is the ratio of 

A solid sphere, a thin ring and a cylinder of same mass and radius, held at rest are released simultaneously to roll down on an inclined plane. Which one will reach the bottom first?

Point masses $1, 2, 3$ and $4 \mathrm{kg}$ are lying at the points $(0, 0, 0), (2, 0, 0), (0, 3, 0)$ and $(-2, -2, 0)$, respectively. The moment of inertia of this system about the $x$-axis will be,

Four similar point masses (each of mass $m$) are placed on the circumference of a disk of mass $M$ and radius $R$. The moment of inertia of the system about the normal axis through the center $O$ will be,

On the marks of $20 \mathrm{cm}$ and $70 \mathrm{cm}$ of a light meter scale, two weights, $1 \mathrm{kg}$ and $4 \mathrm{kg}$, respectively, are placed. The moment of inertia (in $\mathrm{kg} {\mathrm{m}}^2$) about the vertical axis through the $100 \mathrm{cm}$ mark will be,

M.O.I is the ratio of 

M.O.I. of a disc is minimum about an axis 

The moment of inertia of hollow cylinder having density $\rho$ and height $h$ is $\frac{\pi \rho h{r}^4}{2}$.

Describe the term moment of inertia of hollow cylinder?

The moment of inertia of a hollow cylinder of mass $M$ and inner radius $R_1$ and outer radius $R_2$ about its central axis is

A flywheel is used in an automobile engine due to its:

Why fly wheels are used in vehicles?

A solid cylinder is made of radius R and height 3R having mass density $\rho$ . Now two half spheres of radius R are removed from both ends. The moment of inertia of remaining portion about axis ZZ' can be calculated as $\frac{29}{6K}\pi R^5\rho$ . Find K.

The inductance in a coil plays the same role as

The moment of inertia of a rigid body depends on:

A closed cylindrical tube containing some water (not filling the entire tube) lies in a horizontal plane. If the tube is rotated about a perpendicular bisector, what happens to the moment of inertia of water about the axis?

A circular disc $A$ of radius $r$ is made from an iron plate of thickness $t$ and another circular disc $B$ of radius $4 r$ is made from an iron plate of thickness $\frac{t }{4}$. What is the relation between the moments of inertia of $I_{\mathrm{A}}$ and $I_{\mathrm{B}}$?

Fly wheel is an important part of an engine because: