Home
Class 11
PHYSICS
An object of mass 2kg is moved from infi...

An object of mass `2kg` is moved from infinity to a point `P`. Initially that object was at rest but on reaching `P` its speed is `2m//s`. The then potential at `P` is .........`J//kg`.

A

`8`

B

`-2`

C

`4`

D

`-4`

Text Solution

Verified by Experts

The correct Answer is:
B
`W=m(DeltaV)+DeltaKE`
Promotional Banner

Topper's Solved these Questions

  • GRAVITATION

    NARAYNA|Exercise LEVEL-II (H.W)|32 Videos

  • GRAVITATION

    NARAYNA|Exercise LEVEL-V|54 Videos

  • GRAVITATION

    NARAYNA|Exercise NCERT BASED QUESTIONS|26 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

An object of mass 2 Kg is moved from infinity to a poitn P. Initially that object was st rest but on reching P its speed is 2m/s. The workdone in moving that object is -4J. Then potential at P is …………….. J/kg

An object of mass 1 kg is moving with a velocity 10 m/s. Find the kinetic energy of the object

An object of 10 kg is moving with a speed of 2 m/s. The kinetic energy of the object is:

A person brings a mass of 1 kg from infinty to a point A . Initially, the mass was at rest but it moves at a speed of 3 m//s as it reaches A . The work done by the person on the mass is - 5.5 J . The gravitational potential at A is

A person brings a mass of 1 kg from infinity to a point . Initally the mas was at rest but it moves at a speed of 2 ms^-1 as it reaches A. The work done by the perosn on the mass is -3J. The potential at A is

A body of mass 1kg is taken from infinity to a point P. When the body reaches that point, it has a speed of 2ms^-1 . The work done by the conservative force is -5J . Which of the following is true (assuming non-conservative and pseudo-forces to be absent).

NARAYNA-GRAVITATION-LEVEL -I(H.W)
  1. If W is the weight of a satellite on the surface of the earth, then th...

    Text Solution

    |

  2. A body of mass m is lifted from the surface of earth of height equal t...

    Text Solution

    |

  3. An object of mass 2kg is moved from infinity to a point P. Initially t...

    Text Solution

    |

  4. If mass of the earth is M, radius is R, and gravitational constant is ...

    Text Solution

    |

  5. A body of mass m is placed on the earth surface is taken to a height o...

    Text Solution

    |

  6. A body is released from a height 5R where R is the radius of the earth...

    Text Solution

    |

  7. The difference in PE of an object of mass 10 kg when it is taken from ...

    Text Solution

    |

  8. If the gravitational potential energy of a body at a distance r from t...

    Text Solution

    |

  9. The escape velocity of an object on a planet whose radius is 4 times t...

    Text Solution

    |

  10. The escape velocity of a sphere of mass m is given by

    Text Solution

    |

  11. A body is projected up with a velocity equal to 3//4th of the escape v...

    Text Solution

    |

  12. A spacecraft is launched in a circular orbit very close to earth. What...

    Text Solution

    |

  13. If the escape velocity on the earth is 11.2 km//s, its value for a pla...

    Text Solution

    |

  14. The escape velocity of a body from earth's surface is ve. The escape v...

    Text Solution

    |

  15. The escape velocity of a body from the surface of the earth is V(1) an...

    Text Solution

    |

  16. The ratio of the orbital speeds of two satellites of the earth if the ...

    Text Solution

    |

  17. An artificial satellite is revolving in a circular orbit at height of ...

    Text Solution

    |

  18. The mean radius of the orbit of a satellite is 4 times as great as tha...

    Text Solution

    |

  19. If the mass of earth were 4 times the present mass, the mass of the mo...

    Text Solution

    |

  20. A satellite of mass m revolves around the earth of mass M in a circula...

    Text Solution

    |