Home
Class 11
PHYSICS
The earth is an approximate sphere. If t...

The earth is an approximate sphere. If the interior contained matter which is not of the same density every where, then on the surface of the earth, the acceleration due to gravity

A

will be directed towards the centre but not the same every where

B

will have the same value every but not directied towards the centre

C

will be same everywhere in magnitude directed towards the centre

D

Cannot be zero at any point.

Text Solution

Verified by Experts

The correct Answer is:
A
Acceration due to gravity g=0, at the centre if we assume the earth as a sphere of uniform density, then it can be treated as point mass placed at its centre.
But on surface of the earth the acceleration due to gravity cannot be zero at any point.
Promotional Banner

Topper's Solved these Questions

  • GRAVITATION

    NARAYNA|Exercise EXERCISE -III|42 Videos

  • FRICTION

    NARAYNA|Exercise Passage type of questions I|6 Videos

  • KINETIC THEORY OF GASES

    NARAYNA|Exercise LEVEL-III(C.W)|52 Videos

Similar Questions

Explore conceptually related problems

Acceleration due to gravity of earth

Assuming the earth to be a sphere of uniform density, the acceleration due to gravity

Average density of the earth in a region (g is acceleration due to gravity)

At a height equal to earth's radius, above the earth's surface, the acceleration due to gravity is

Assume the earth to be a sphere of uniform density the accleration due to gravity

A particle is taken to a height R above the earth's surface, where R is the radius of the earth. The acceleration due to gravity there is

If R is the radius of the Earth then the height above the Earth's surface at which the acceleration due to gravity decreases by 20% is

The value of acceleration due to gravity is……….every where on the surface of earth.

Knowledge Check

  • The earth is an approximate sphere. If the interior contained matter which is not of the same density everywhere, then on the surface of the earth, the acceleration due to gravity.

    A
    will be directed towards the centre but not the same everywhere
    B
    will have the same value everywhere but not directed towards the centre
    C
    will be same everywhere in magnitude directed towards the same
    D
    cannot be zero at any point

  • Assuming the earth to be a sphere of uniform density, the acceleration due to gravity

    A
    at a point outside the earth is inversely proportional to the square of its distance from the centre
    B
    at a point outside the earth is inversely proportional to its distance from the centre
    C
    at a point inside is zero
    D
    at a point inside is inversely proportional to its distance from the centre.

  • At a height equal to earth's radius, above the earth's surface, the acceleration due to gravity is

    A
    g
    B
    `(g )/(2)`
    C
    `(g )/(4)`
    D
    `g/8`
    • NARAYNA-GRAVITATION-EXERCISE -IV
    1. The earth is an approximate sphere. If the interior contained matter w...

      Text Solution

      |

    2. Different points in the earth are at slightly different distance from ...

      Text Solution

      |

    3. Satellites orbiting the earth have finite life and sometimes debris of...

      Text Solution

      |

    4. Particles of masses 2M, m and M are respectively at points A, B and C ...

      Text Solution

      |

    5. A point mass is orbiting a significant mass M lying at the focus of th...

      Text Solution

      |

    6. A planet of mass m revolves in elliptical orbit around the sun of mass...

      Text Solution

      |

    7. A planet revolves around the sun in elliptical orbit of eccentricity '...

      Text Solution

      |

    8. The gravitational field in a region is given by vecE = (3hati- 4hatj) ...

      Text Solution

      |

    9. A solid sphere of uniform density and mas M has radius 4M. Its centre ...

      Text Solution

      |

    10. A point P lies on the axis of a fixed ring of mass M and radius R, at ...

      Text Solution

      |

    11. Two having masses M and 2M, respectively, having the same radius R are...

      Text Solution

      |

    12. A point of mass m is released from rest at a distance of 3R from the c...

      Text Solution

      |

    13. A small body of superdense material, whose mass is twice the mass of t...

      Text Solution

      |

    14. From a solid sphere of mass m and radius R, a spherical portion of rai...

      Text Solution

      |

    15. The density of the core of a planet is rho(1) and that of the outer sh...

      Text Solution

      |

    16. Two concnetric shells of different masses m(1) and m(2) are having a ...

      Text Solution

      |

    17. Suppose a vertical tunnel is dug along the diameter of earth assumed t...

      Text Solution

      |

    18. The centres of a ring of mass m and a sphere of mass M of equal radius...

      Text Solution

      |

    19. A mass m extends a vertical helical spring of spring constant k by xm ...

      Text Solution

      |

    20. A spherical shell is cut into two pieces along a chord as shown in the...

      Text Solution

      |