Home
Class 12
PHYSICS
A man standing on a frictionless rotatin...

A man standing on a frictionless rotating platform rotates at 1 rps, his arms are outstretched and he holds a weight in his hands. In this position, the total moment of inertia of the system is `6 kg m^2`, he leaves the weights, the moment of inertia decreases to `2kg m^2`. The resulting angular speed of the platform is

A

2 rps

B

4 rps

C

3 rps

D

6 rps

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

A person standing on a rotating platform with his hands lowered, outstretches his arms. The angular momentum of the person

A person stands on a uniformly rotating turn table with outstretched arms holding two identical weights. The moment of inertia of the system is 60 kgm^2 . When he brings the arms close to his body, the M.I. of inertia reduces to 58 kgm^2 . The angular speed of the system now becomes 3 rad s^-1 . Find the initial angular speed and the final K.E.

The moment of inertia of a ring about one of its diameters is 2 kg m^2 . What will be its moment of inertia about a tangent parallel to the diameter ?

Particles each of mass 1kg are placed at 1m, 2 m and 4 m on X-axis with respect to origin. Then moment of inertia of the system about Y-axis is

Two bodies of masses 1 kg and 2 kg, separated by 6 m are rotating about the centre of mass of the system. The moment of inertia of the system is

A boy stands on a freely rotating platform with his arms extended. Hisrotation speed is 0.3 rev/s, when he draws in, his speed increases to 0.5 rev/s, then.the ratio of his moments of inertia in these two cases will be

Three particles of masses1kg, 2 kg and 3 kg are at distances 1 m, 2 m and 3 m from the axis of rotation. The moment of inertia of the system is

If moment of inertia of a solid sphere of mass 5 kg about its diameter is 50 kg m^2 . Its moment of inertia about its tangent in kg m^2 is

Kinetic energy of a body is 4 J and its moment of inertia is 2 kg m^2 , then angular momentum is

The rotational kinetic energies of two bodies of moments of inertia 9 kg m^2 and 1kg m^2 are same. The ratio of their angular momenta is