Angular momentum of the particle rotating with a central force is constant due to:

A circular disc of radius $r$ is rolling without slipping on a horizontal surface. What is the ratio of the translational KE and rotational KE of disc?

Select the correct statement:

A ring of mass $10 \mathrm{kg}$ and radius of $1 \mathrm{m}$ is rotating at the rate of  $\frac{300}{\mathrm{\pi }} \mathrm{RPM}$  then:

The moment of inertia of a body about a given axis is $1.2 {\mathrm{kgm}}^2$. Initially the body is at rest. In order to produce a rotational kinetic energy of $1500 \mathrm{J}$, an angular acceleration of $25 \mathrm{rad} {\mathrm{s}}^{-2}$ must be applied about that axis for a duration of.

A boy comes and sits suddenly on a circular rotating table. What will remain conserved for the table-boy system?

If a person sitting on a rotating stool with his hands outstretched, suddenly pulls his arms inside then his:

Two solid cylinders $\mathrm{P}$ and $\mathrm{Q}$  of same mass and same radius start rolling down a fixed inclined plane from the same height at the same time. Cylinder $\mathrm{P}$ has most of its mass concentrated near its surface, while $\mathrm{Q}$ has most its mass concentrated near the axis.

A boy is standing on a rotating table with dumbbells in his hand. He suddenly pulls the dumbbells towards his chest, the angular velocity of the table will: