The following motion is based on the law of conservation of angular momentum
(A) rotation of top (B) diving of driver
(C) rotation of ballet dancer on smooth horizontal surface
(D) a solid sphere that rolls down on an inclined plane

The law of conservation of angular momentum is obtained from Newton's II law in rotational motion when

A uniform solid sphere rolls on a horizontal surface at 20 m/s. It, then, rolls up a plane inclined at

The rotational kinetic energy of a solid sphere of mass 3 kg and radius 0.2 rolling down an inclined plane of height 7 m is

A solid sphere of radius r is rolling on a horizontal surface. The ratio between the rotational kinetic energy and total energy.

A sphere rolling on a horizontal rough surface Collides elastically with a smooth vertical wall, as shown in Fig. State which of the following statements is true or false. a. After collision, the velocity of the centre of mass gets reversed. b. Angular momentum of the sphere about the point of contact with the wall is conserved. c. Angular momentum of the sphere about a stationary point on the horizontal surface is conserved. d. Just after collision the point of contact with the horizontal surface is moving towards the wall. e. After collision the friction force acts on the sphere such that it decreases the linear speed and increases the angular speed. f. Finally, when the sphere starts rolling, it is moving away from the wall.

A sphere rolling on a horizontal rough surface Collides elastically with a smooth vertical wall, as shown in Fig. State which of the following statements is true or false. a. After collision, the velocity of the centre of mass gets reversed. b. Angular momentum of the sphere about the point of contact with the wall is conserved. c. Angular momentum of the sphere about a stationary point on the horizontal surface is conserved. d. Just after collision the point of contact with the horizontal surface is moving towards the wall. e. After collision the friction force acts on the sphere such that it decreases the linear speed and increases the angular speed. f. Finally, when the sphere starts rolling, it is moving away from the wall.