Home
Class 11
PHYSICS
Assertion : Angular momentum of a planet...

Assertion : Angular momentum of a planet is constant about any point
Reason : For acting on the planet is a central force.

A

If both Assertin and Reason are correct and Reason is the correct explanation of Assertion

B

If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion

C

If Assertion is true but Reason is false

D

If Assertion is false but Reason is true

Text Solution

Verified by Experts

The correct Answer is:
D
Angular momentum is constant about the centre of sun and the force acting on the planet is a central force.
Promotional Banner

Topper's Solved these Questions

  • GRAVITATION

    DC PANDEY|Exercise (C) Chapter Exercises|45 Videos

  • GRAVITATION

    DC PANDEY|Exercise (A) Chapter Exercises|68 Videos

  • GENERAL PHYSICS

    DC PANDEY|Exercise INTEGER_TYPE|2 Videos

  • KINEMATICS

    DC PANDEY|Exercise INTEGER_TYPE|11 Videos

Similar Questions

Explore conceptually related problems

Assertion : Angular momentum of sun and planet system about any point remains constant Reason : Two equal and opposite forces will acts on them. Net torque of these two set of forces about any point is zero.

Assertion: Linear momentum of a planet does not remain conserved. Reason: Gravitational force acts on it.

A : If angular momentum of an object is constant about a point then net torque on it about that point is zero. R : Torque is equal to the rate of change of angular momentum.

The angular momentum of the atom will be constant about an axis passing through

A : Angular momentum of a satellite about a planet is constant . R :Gravitational force is a central force so its torque about the sun is zero .

Assertion: If linear momentum of a particle is constant, then its angular momentum about any point will also remain constant. Reason: Linear momentum remains constant if F_(n et)=0 and angular momentum remains constant if tau_(n et)=0

Assertion: For the plantes orbiting around the sun, angular speed, linear speed, K.E. changes with time, but angular momentum remains constant. Reason: No torque is acting on the rotating planet. So its angular momentum is constant.

Assertion The angular momentum of system always remain constant. Reason For a system, tau_(ext)=(dL)/(dt)=0

Assertion : If a particle moves with a constant velocity, then angular momentum of this particle about any point remains constant. Reason : Angular momentum has the units of Plank's constant.

Statement-1: For the planets orbiting around the sun, angular speed, linear speed, KE changes with time,but angular momentum remains constant. Statement-2: No torque is acting on the rotating planet, so its angular momentum is constant.

DC PANDEY-GRAVITATION-(B) Chapter Exercises
  1. Assertion : Gravitational force between two masses in air is F. If the...

    Text Solution

    |

  2. Assertion : Angular momentum of a planet is constant about any point ...

    Text Solution

    |

  3. Assertion : Kepler's law for planetary motion are consequence of Newto...

    Text Solution

    |

  4. Assertion : The field strength at the centre of a ring is zero Reaso...

    Text Solution

    |

  5. Assertion : The binding energy of a satellite does not depend upon t...

    Text Solution

    |

  6. Assertion : Plane of a satellite always passes through the centre of e...

    Text Solution

    |

  7. Assertion : Gravitational potential and gravitational potentail energy...

    Text Solution

    |

  8. Assertion : One two sides of a point mass, gravitational field strengt...

    Text Solution

    |

  9. Assertion : If gravitational potential at some point is zero, then gra...

    Text Solution

    |

  10. Assertion : If radius of earth suddenly shrinks to half its present wi...

    Text Solution

    |

  11. Assertion : The centres of two cubes of masses m(1) and m(2) are separ...

    Text Solution

    |

  12. Assertion : If a particle is projected from the surface of earth with ...

    Text Solution

    |

  13. Assertion : On earth's satellite, we feel weightlessness. Moon is also...

    Text Solution

    |

  14. Assertion : The centre of semicircular ring of mass m and radius R is...

    Text Solution

    |

  15. Assertion : If the projuct of surface area and density is same for bot...

    Text Solution

    |

  16. Assertion : Areal velocity of a planet around of surface area and dens...

    Text Solution

    |

  17. Assertion : Mass of the rod AB is m(1) and of particle P is m(2). Dist...

    Text Solution

    |

  18. Assertion : Four point masses each of mass m are placed at points 1, 2...

    Text Solution

    |

  19. Assertion : Let W(1) be the work done in taking away a satellite from ...

    Text Solution

    |

  20. Assertion : Two spherical shells have masses m(1) and m(2). Their radi...

    Text Solution

    |