Home
Class 12
PHYSICS
A disc is rotating with angular velocity...

A disc is rotating with angular velocity `omega`. If a child sits on it, what is conserved?

A

Linear momentum

B

Angular momentum

C

Kinetic energy

D

Potential energy

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

A disc is rotating with angular velocity omega . A force F acts at a point whose position vector with respect to the axis of rotation is r. The power associated with torque due to the force is given by

A disc is rotating with angular velocity omega . A force F acts at a point whose position vector with respect to the axis of rotation is r. The power associated with torque due to the force is given by

A rod is rotating with angular velocity omega about axis AB. Find costheta .

Two discs of radii R and 2R are pressed against each other. Initially, disc with radius R is rotating with angular velocity omega and other disc is stationary. Both discs are hinged at their respective centres and are free to rotate about them. Moment of inertia of smaller disc is I and of bigger disc is 2I about their respective axis of rotation. Find the angular velocity of bigger disc after long time.

A disc is rotaing with an angular velocity omega_(0) . A constant retarding torque is applied on it to stop the disc. The angular velocity becomes (omega_(0))/(2) after n rotations. How many more rotations will it make before coming to rest ?

A disc is rolling without slipping with angular velocity omega . P and Q are two points equidistant from the centre C. the order of magnitude fo velocity is

A circular disc is rotating about its own axis at an angular velocity omega . If P is exact midpoint of dise between axis and rim of disc then angular velocity of Pis

A disc of radius R rotates with constant angular velocity omega about its own axis. Surface charge density of this disc varies as sigma = alphar^(2) , where r is the distance from the centre of disc. Determine the magnetic field intensity at the centre of disc.

A disc of mass m has a charge Q distributed on its surface. It is rotating about an XX' with a angular velocity omega . The force acting on the disc is

Two identical discs are positioned on a vertical axis as shown in the figure. The bottom disc is rotating at angular velocity omega_(0) and has rotational kinetic energy K_(0) .The top disc is initially at rest. It then falls and sticks to the bottom disc. The change in the rotational kinetic energy of the system is