Home
Class 11
PHYSICS
A diver in a swimming pool bends his hea...

A diver in a swimming pool bends his head before diving, because it

A

decreases his moment of inertia

B

decreases his angular velocity

C

increases his moment of inertia

D

decreases his linear velocity

Text Solution

Verified by Experts

The correct Answer is:
A
On bending the head before diving in swimming pool, the moment of inertia of a person decreases.
Promotional Banner

Topper's Solved these Questions

  • ROTATION

    DC PANDEY|Exercise (B) Chapter Exercises|25 Videos

  • ROTATION

    DC PANDEY|Exercise (C) Chapter Exercises|39 Videos

  • ROTATION

    DC PANDEY|Exercise Check point 9.3|15 Videos

  • RAY OPTICS

    DC PANDEY|Exercise Integer type q.|15 Videos

  • ROTATIONAL MECHANICS

    DC PANDEY|Exercise Subjective Questions|2 Videos

Similar Questions

Explore conceptually related problems

A diver in a swimming poole wants to signal his distress to a person lying on the edge of the pool by flashing his water proof flash light

A novice scuba diver practicing in a swimming pool takes enough air from his tank to fully expand his lungs before abandoning the tank at depth l. and swimming to the surface , failing to exhale during his ascent . At the surface , the difference Delta p between the external pressure on him and the air pressure in his lungs is 9.3 kPa . From what depth does he start ? What potentially lethal danger does he face ?

A man standing in a swimming pool looks at a stone lying at the bottom. The depth of the swimming pool is h. At what distance from the surface of water is the image of the stone formed -

A man stnading in a swimming pool looks at a stone lying at the bottom. The depth of the swimming pool is h. At what distance from the surface of water is the image of the stone formed? (Line of vision is normal, Refractive index of water is n)

Suppose you are inside the water in a swimming pool near an edge. A friend is standing on the edge. Do you find your friend taller or shorter than his usual height ?

Ozone is spread in the swimming pool because:

Rashid has decided to build a swimming pool as shown in the figure on an empty plot 25 metres long and 15 metres wide. He is discussing with his son Majid about his plan to build the pool, put tiles on the bottom of the pool and other requirements of the pool. Can you help Majid to answer the following questions which his father has asked in the discussion? What is the surface area of the pool?

DC PANDEY-ROTATION-(A) Chapter Exercises
  1. A uniform disc of radius a and mass m, is rotating freely with angular...

    Text Solution

    |

  2. A uniform square plate has a small piece Q of an irregular shape remov...

    Text Solution

    |

  3. A diver in a swimming pool bends his head before diving, because it

    Text Solution

    |

  4. A ody is in pure rotation. The linear speed v of a particle, the dista...

    Text Solution

    |

  5. The rotational kinetic energy of a body is E and its moment of inertia...

    Text Solution

    |

  6. A body is under the action of two equal and oppositely directed forces...

    Text Solution

    |

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

    Text Solution

    |

  8. Moment of a force of magnitude 10 N acting along positive y-direction ...

    Text Solution

    |

  9. The radius of gyration of a uniform rod of length L about an axis pass...

    Text Solution

    |

  10. Five particles of mass 2 kg are attached to the rim of a circular disc...

    Text Solution

    |

  11. A particle is moving in a circular orbit with constant speed. Select w...

    Text Solution

    |

  12. If the equation for the displacement of a particle moving on a circle ...

    Text Solution

    |

  13. A wheel is a rest. Its angular velocity increases uniformly and become...

    Text Solution

    |

  14. A rigid body rotates about a fixed axis with variable angular velocity...

    Text Solution

    |

  15. A wheel is rotating at the rate of 33 "rev min"^(-1). If it comes to s...

    Text Solution

    |

  16. A wheel is rotating at 900 rpm about its axis. When power is cut off i...

    Text Solution

    |

  17. A wheel is subjected to uniform angular acceleration about its axis. I...

    Text Solution

    |

  18. The motor of an engine is rotating about its axis with an angular velo...

    Text Solution

    |

  19. If vec F is the force acting in a particle having position vector vec ...

    Text Solution

    |

  20. A particle of mass 5 kg is moving with a uniform speed of 3 sqrt(2) "c...

    Text Solution

    |