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A ring of mass 6kg and radius 40cm is re...

A ring of mass `6kg` and radius `40cm` is revolving at the rate of `300` rpm about an axis passing through its diameter. The kinetic energy of rotation of the ring is

A

`24pi^(2)J`

B

`48pi^(2)J`

C

`12pi^(2)J`

D

`6pi^(2)J`

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AAKASH INSTITUTE ENGLISH-SYSTEM OF PARTICLES AND ROTATIONAL MOTION-Assignment (Section - A) Objective Type Questions (One option is correct)
  1. A flywheel rotates about a fixed axis and slows down from 300 r.p.m to...

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  2. A body starting from rest gains an angular speed of 540 r.p.m in 6 sec...

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  3. A ring of mass 6kg and radius 40cm is revolving at the rate of 300 rpm...

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  4. A ring of mass 10kg and diameter 0.4m is rotated about an axis passing...

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  5. If radius of the earth contracts to half of its present value without ...

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  6. A wheel whose moment of inertia is 10kgm^(2) has an initial angular ve...

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  7. Two solid spheres are made up of the same material of density rho. The...

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  8. A fan of moment of inertia 0.6kgm^(2) is moving with a speed of 0.5 r....

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  9. A hollow cylinder open at both ends slides without rotating, and then ...

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  10. A solid sphere of mas 2kg rolls on a table with linear speed of 1 m//s...

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  11. The moment of inertia of a uniform cicrular disc about its diameter is...

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  12. A flywheel rotating about a fixed axis has a kinetic energy of 360J wh...

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  13. We have two spheres, one of which is hollow and the other solid. They ...

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  14. The moment of inertia of a body about a given axis is 1.2 kg m^(2). In...

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  15. A solid cylinder of mass 20 kg rotates about its axis with angular vel...

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  16. A solid sphere is rolling without slipping on a horizontal plane. The ...

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  17. If I(1) is the moment of inertia of a thin rod about an axis perpendic...

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  18. A wheel of moment of inertia 30 kg m^(2) is rotating at 10 rotations p...

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  19. A ring of mass 1kg and radius 1m is moving with a velocity of 1m//s by...

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  20. A disc and a ring of the same mass are rolling down frictionless incli...

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