Home
Class 11
PHYSICS
If a sphere of mass 2kg and diameter 10c...

If a sphere of mass `2kg` and diameter `10cm` is rolling at speed of `5ms^(-1).` Its rotational kinetic energy is

A

`10J`

B

`30J`

C

`50J`

D

`70J`

Text Solution

Verified by Experts

The correct Answer is:
A
`KE_(rot)=1/2Iomega^(2)`
Promotional Banner

Topper's Solved these Questions

  • SYSTEM OF PARTICLES

    NARAYNA|Exercise Level-II(C.W.)|64 Videos

  • SYSTEM OF PARTICLES

    NARAYNA|Exercise Level-III|66 Videos

  • SYSTEM OF PARTICLES

    NARAYNA|Exercise C.U.Q.|83 Videos

  • PHYSICAL WORLD

    NARAYNA|Exercise C.U.Q|10 Videos

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTION

    NARAYNA|Exercise EXERCISE - IV|39 Videos

Similar Questions

Explore conceptually related problems

A thin ring of mass 1kg and radius 1m is rolling at a speed of 1ms^(-1) . Its kinetic energy is

A flywheel of mass 10 kg and radius 10 cm is revolving at a speed of 240 r.p.m. Its kinetic energy is

A ring of mass 1kg and diameter 1m is rolling on a plane road with a speed 2m/s. Its kinetic energy would be -

A wheel of mass 10 kg and radius of gyration 50 cm is rotating at 300 rpm. Then, the rotational kinetic energy of the wheel is

A circular disc of mass 2 kg and radius 10 cm rolls without slipping with a speed 2 m/s. The total kinetic energy of disc is

A solid sphere of mas 2kg rolls on a table with linear speed of 1 m//s . Its total kinetic energy is

A solid cylinder of mass 2kg rolls down (pure rolling) an inclined plane from a height of 4m. Its rotational kinetic energy, when its reaches the foot of the plane is (Take g=10m s^(-2))

A solid sphere of mass 500 gm and radius 10 cm rolls without slipping with the velocity 20cm/s. The total kinetic energy of the sphere will be

A solid sphere of mass 1 kg rolls on a table with linear speed 1 m/s. Its total kinetic energy is

NARAYNA-SYSTEM OF PARTICLES-Level-1(C.W.)
  1. If the earth were to suddenly contract to 1//n^(th) of its present rad...

    Text Solution

    |

  2. A particle performing uniform circular motion gas angular momentum L. ...

    Text Solution

    |

  3. A ballet dancer is rotating about his own vertical axis at an angular ...

    Text Solution

    |

  4. A thin circular ring of mass M and radius r is rotating about its axis...

    Text Solution

    |

  5. A ballet dancer is rotating at angular velocity omega on smooth horizo...

    Text Solution

    |

  6. A particle of mass m is moving along a circle of radius r with a time ...

    Text Solution

    |

  7. If the radius of earth shrinks by 0.2% without change in its mass, the...

    Text Solution

    |

  8. A metallic circular plate is rotating about its axis without friction....

    Text Solution

    |

  9. A constant torque acting on a uniform circular wheel changes its angul...

    Text Solution

    |

  10. Density remaining constant, if earth contracts to half of its present ...

    Text Solution

    |

  11. A mass is whirled in a circular path with an angular momentum L. If th...

    Text Solution

    |

  12. An automobile engine develops 100 kilo-watt, when rotating at a speed ...

    Text Solution

    |

  13. An electric motor exerts a constant torque 5Nm on a fly wheel by which...

    Text Solution

    |

  14. A shaft rotating at 3000 rpm is transmitting a power of 3.14 KW. The m...

    Text Solution

    |

  15. A solid sphere rolls down without slipping from rest on a 30^@ incline...

    Text Solution

    |

  16. A hollow sphere rolls down a 30^@ incline of length 6m without slippin...

    Text Solution

    |

  17. For a body rolling along a level surface, the translational and rotati...

    Text Solution

    |

  18. A ring and a disc of same mass roll without slipping along a horizonta...

    Text Solution

    |

  19. When a hollow sphere is rolling without slipping on a rough horizontal...

    Text Solution

    |

  20. If a sphere of mass 2kg and diameter 10cm is rolling at speed of 5ms^(...

    Text Solution

    |