Home
Class 11
PHYSICS
If the accelaration due to gravity becom...

If the accelaration due to gravity becomes 4 times its original value, then escape speed

A

remains same

B

2 times of original value

C

becomes halved

D

4 times of original value

Text Solution

Verified by Experts

The correct Answer is:
B
Escape speed `v_(e)=sqrt(2gR)`
If g' = 4g
then `v_(e)^(1)=sqrt(2g'R)`
`=sqrt(2(4g)R)`
`=sqrt(8gR)`
`=sqrt(4xx2gR)`
`=sqrt(4)v_(e)`
`v_(e)^(1)=2v_(e)`
Promotional Banner

Topper's Solved these Questions

  • GRAVITATION

    PREMIERS PUBLISHERS|Exercise EVALUATION TEXTBOOK QUESTION & ANSWERS (SHORT ANSWER QUESTIONS)|30 Videos

  • GRAVITATION

    PREMIERS PUBLISHERS|Exercise EVALUATION TEXTBOOK QUESTION & ANSWERS (LONG ANSWER QUESTIONS)|32 Videos

  • KINEMATICS

    PREMIERS PUBLISHERS|Exercise Other important questions & answers (V. Numerical problems).|166 Videos

Similar Questions

Explore conceptually related problems

At what height from the center of the Earth the acceleration due to gravity will be 1/4th of its value as at the earth.

The Moon's radius is 1/4 that of earth and its mass is 1/80 times that of the Earth. If g represents the acceleration due to gravity on the surface of Earth, that on the surface of the Moon is ..........

The height at which the acceleration due to gravity becomes (g)/(9) (where g = the acceleration due to gravity on the surface of the Earth) in terms of R, the radius of the Earth, is:

PREMIERS PUBLISHERS-GRAVITATION-OTHER IMPORTANT QUESTION & ANSWERS (CONCEPTUAL QUESTIONS)
  1. If the accelaration due to gravity becomes 4 times its original value,...

    Text Solution

    |

  2. Why a body weighs less at the equator than at the poles?

    Text Solution

    |

  3. Where does a body weigh less? At the sea level or on the mountains?

    Text Solution

    |

  4. Why do you feel giddy while moving on Raatinam (or) Carrousel?

    Text Solution

    |

  5. Explain why one can jump higher on the surface of the Moon than that o...

    Text Solution

    |

  6. A planet revolves in an elliptical orbit around the Sun. The semi-majo...

    Text Solution

    |

  7. If Earth be at one fourth its present distance from the Sun, how many ...

    Text Solution

    |

  8. State Newtons Universal law of gravitaion.

    Text Solution

    |

  9. Why does the gravitational potential energy U(r) is always negative?

    Text Solution

    |

  10. What happens to the acceleration due to gravity on account of rotation...

    Text Solution

    |

  11. Under what condition, the gravitational potential energy of a body wil...

    Text Solution

    |

  12. Can we determine the gravitational mass of a body inside an artificial...

    Text Solution

    |

  13. Mention the factors which determine whether a planet would have an atm...

    Text Solution

    |

  14. If the Earth stops rotating about its axis, then by what value will th...

    Text Solution

    |

  15. A hippopotamus and a frog are to be projected out of Earth into space....

    Text Solution

    |

  16. Tides arise in the ocean. Give reason.

    Text Solution

    |

  17. Why does an astronaut in a spacecraft feel weightlessness?

    Text Solution

    |

  18. Where does the weight of a body become zero?

    Text Solution

    |

  19. Why a body weighs less at the equator than at the poles?

    Text Solution

    |

  20. Where does a body weigh less? At the sea level or on the mountains?

    Text Solution

    |

  21. Why do you feel giddy while moving on Raatinam (or) Carrousel?

    Text Solution

    |