Home
Class 11
PHYSICS
Rocket engines lift a rocket from the ea...

Rocket engines lift a rocket from the earth surface, because hot gases with high velocity

A

push against the air

B

push against the earth

C

react against the rocket and push it up

D

heat up the air which lifts the rocket.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Centre of mass

    MODERN PUBLICATION|Exercise Exercise|30 Videos

  • Dynamics of Circular Motion

    MODERN PUBLICATION|Exercise Exercise|81 Videos

Similar Questions

Explore conceptually related problems

A ship produces ultrasonic sound which is collected in 3.42 s after reflection from the surface of sea. If the velocity of ultrasonics is 1531ms^-1 , then what is the distance of sea surface from sea ?

A rocket is fired vertically with a speed of 5 km s^-1 from the earth’s surface. How far from the earth does the rocket go before returning to the earth ? Mass of the earth = 6.0 xx 10^24 kg , mean radius of the earth = 6.4 xx 10^6 m , G = 6.67 xx 10^-11 N m^2kg^-2 .

A rocket is fired with a speed of 2sqrt(gR) near the surface of earth and is direceted upwards .What is the speed of the rocket in the interstellar space?

A rocket is fired from the earth towards the sun. At what distance from the earth’s centre is the gravitational force on the rocket zero ? Mass of the sun = 2xxl0^30 kg , mass of the earth = 6xxl0^24 kg . Neglect the effect of other planets etc. (orbital radius = 1.5 xx 10^11 m ).

MODERN PUBLICATION-Competitive Exam Question-Exercise
  1. In the figure given, the position-time graph of a particle of mass 0.1...

    Text Solution

    |

  2. When a horse pulls a wagon, the force that causes the horse to move fo...

    Text Solution

    |

  3. Rocket engines lift a rocket from the earth surface, because hot gases...

    Text Solution

    |

  4. If two forces of equal magnitudes act simultaneously on a body in the ...

    Text Solution

    |

  5. If a person with a spring balance and a body hanging from it goes up a...

    Text Solution

    |

  6. A person is standing in an elevator. In which situation he finds his w...

    Text Solution

    |

  7. What is non-conservative force?

    Text Solution

    |

  8. A gun fires a bullet of mass 50 g with a velocity of 30 m s^(-1). Beca...

    Text Solution

    |

  9. A bullet is fired from a rifle. If the rifle recoils freely, then the ...

    Text Solution

    |

  10. Rocket works on the principle of conservatin of:

    Text Solution

    |

  11. A simple pendulum is set up in a trolley which is moving with an accel...

    Text Solution

    |

  12. The forces, which meet at one point but their lines of action do not i...

    Text Solution

    |

  13. In ordinary terrestrial experiments, the observer in an inertial frame...

    Text Solution

    |

  14. If the normal force is doubled, then coefficient of friction is

    Text Solution

    |

  15. A body of mass m is placed on a rough surface with coefficient of fric...

    Text Solution

    |

  16. When two surface are coated with a lubricant, then they :

    Text Solution

    |

  17. A wheel has an angular acceleration of 3 rad s^(-2) and an initial ang...

    Text Solution

    |

  18. A car moving on a circular path of length 4 pi metre experience a forc...

    Text Solution

    |

  19. A particle revolves round a circular path. The acceleration of the par...

    Text Solution

    |

  20. If the radii of circular paths of two particles of same masses are in ...

    Text Solution

    |