Home
Class 9
PHYSICS
A rocket of mass 1000 kg exhausts gases ...

A rocket of mass 1000 kg exhausts gases at a rate of 4 kg /sec with a velocity 3000 `m//s` . The thrust developed on the rocket is

A

12000N

B

120N

C

800N

D

200N

Text Solution

Verified by Experts

The correct Answer is:
A
Thrust on rocket =`-u (dm)/(dt)=-3000 times 4`
=-12000 N
the negative sign indicates that thrust on the rocket is in a direction opposite to the direction of escaping gases.
Promotional Banner

Topper's Solved these Questions

  • FORCE AND LAWS OF MOTION

    MTG IIT JEE FOUNDATION|Exercise EXERCISE (MATCH THE FOLLOWING )|2 Videos

  • FORCE AND LAWS OF MOTION

    MTG IIT JEE FOUNDATION|Exercise EXERCISE (ASSERTION AND REASON )|10 Videos

  • FORCE AND LAWS OF MOTION

    MTG IIT JEE FOUNDATION|Exercise EXERCISE MULTIPLE CHOICE QUESTIONS|1 Videos

  • FOOTSTEPS TOWARDS NEET

    MTG IIT JEE FOUNDATION|Exercise Multiple Choice Question|45 Videos

  • GRAVITATION

    MTG IIT JEE FOUNDATION|Exercise Olympiad/HOTS Corner|20 Videos

Similar Questions

Explore conceptually related problems

In a rocket of mass 1000 kg fuel is consumed at a rate of 40 kg/s . The velocity of the gases ejected from the rocket is 5xx10^(4)m//s . The thrust on the rocket is

A rocket of mass 5700 kg ejects mass at a constant rate of 15 kg/s withe constant speed of 12 km/s. The acceleration of the rocket 1 minute after the blast is (g=10m//s^(2))

A rocket of mass 20000 kg is ejecting the gases at the rate of 50 kg/sec with speed of 20 m/sec in gravity free space. Find the acceleration of rocket at 2 sec.

A rocket has a mass of 100 kg . 90% of this is fuel. It ejects fuel vapours at the rate of 1 kg//sec with a velocity of 500 m//sec relative to the rocket. It is supposed that the rocket is outside the gravitational field. The initial upthrust on the rocket when it just starts moving upwards is

A rocket of initial mass 6000 kg ejects gases at constant rate of 20 kg//s with constant relative speed of 8 km//s . What is the acceleration of the rocket after 100 s . (a) Neglect gravity , (b) include gravity and (c ) upward thrust.

A rocket weighs 13,500 kg when fuelled up on the launching pad . It is fired vertically upward . Gases are exhausted at the rate of 145 kg per second with velocity 1500 ms^(-1) relative to the rocket . What is the thrust on the rocket ?

A rocket of initial mass m ( including fuel) ejects mass at a constant rate of 25 kg/s with a speed 60 m/s relative to the rocket. If the acceleration of the rocket 3.5 minutes after the firing is 2m//s^(2) . What is the initial mass of the rocket ? [Neglect gravity] Express your answer in unit of 10^(3) kg

In a rocket, fuel burns at the rate of 2 kg/s. This fuel gets ejected from the rocket with a velocity of 80 km/s. Force exerted on the rocket is -

MTG IIT JEE FOUNDATION-FORCE AND LAWS OF MOTION-EXERCISE (MULTIPLE CHOICE QUESTIONS)
  1. A body of mass m kg starts from rest and travels a distance of s m in ...

    Text Solution

    |

  2. A mass of 100g strikes the wall with speed 5ms^-1 at an angle as shown...

    Text Solution

    |

  3. A rocket of mass 1000 kg exhausts gases at a rate of 4 kg /sec with a ...

    Text Solution

    |

  4. A gun of mass 10kg fires 4 bullets per second. The mass of each bullet...

    Text Solution

    |

  5. the 35 kilogram girl is standing on a 20 kilogram wagon and jumps off....

    Text Solution

    |

  6. 9.8N is equal to

    Text Solution

    |

  7. Displacement time graph of an object of mass 2kg is shown in figure. T...

    Text Solution

    |

  8. Velocity time graph of an object of mass 2kg is shown in figure. The f...

    Text Solution

    |

  9. A car and a motorcycle are moving with the same momentum. When equal r...

    Text Solution

    |

  10. If a constant force acts on a body initially at rest, the distance mov...

    Text Solution

    |

  11. The unit of force in SI system is newton (N) and in CGS system is dyne...

    Text Solution

    |

  12. Which is velocity time graph of a moving particle on which net externa...

    Text Solution

    |

  13. A force of 100N acts on a ball moving on a surface. The force of frict...

    Text Solution

    |

  14. A particle of mass 0.3kg is subjected to a force F=kx with k=15N//m an...

    Text Solution

    |

  15. A ship of mass 3 times 10^7 kg initially at rest is pulled by a force ...

    Text Solution

    |

  16. A body of mass m is at rest. Another body of same mass moving with vel...

    Text Solution

    |

  17. In a rocket, fuel bums at the rate of 1 kg/s. This fuel is ejected fro...

    Text Solution

    |

  18. During a football match, the ball shot towards the goal struck the def...

    Text Solution

    |

  19. the breaking strength of a steel cable is 20kN. If one pulls horizonta...

    Text Solution

    |

  20. A moving truck crashes into a stationary car. The truck's mass is ten ...

    Text Solution

    |