Questions in rotational-motion

Select	Question
	The speed of rolling of a ring of mass $M$ changes from $V$to $3V$. What is the change in its kinetic energy
	A disc of radius $1\,m$ and mass $4\,kg$rolls on a horizontal plane without slipping in such a way that its centre of mass moves with a speed of $10\,cm/\sec .$ Its rotational kinetic energy is
	The ratio of kinetic energies of two spheres rolling with equal centre of mass velocities is 2 : 1. If their radii are in the ratio 2 : 1; then the ratio of their masses will be
	A symmetrical body of mass $M$and radius $R$ is rolling without slipping on a horizontal surface with linear speed v. Then its angular speed is
	A solid sphere of mass 1 kg rolls on a table with linear speed 1 m/s. Its total kinetic energy is
	A circular disc has a mass of 1 kg and radius 40 cm. It is rotating about an axis passing through its centre and perpendicular to its plane with a speed of 10 rev/s. The work done in joules in stopping it would be
	Rotational kinetic energy of a given body about an axis is proportional to
	If a body completes one revolution in $\pi $sec then the moment of inertia would be
	A tangential force F is applied on a disc of radius R, due to which it deflects through an angle $\theta $ from its initial position. The work done by this force would be
	If the rotational kinetic energy of a body is increased by 300% then the percentage increase in its angular momentum will be