Home
Class 9
PHYSICS
While extinguishing fire, the fireman ha...

While extinguishing fire, the fireman has hold the hose pipe very strongly. This is because as water rushes out at a great speed

A

the hose pipe tends to move backward due to strong force of reaction

B

the hose pipe exerts huge pressure in the forward direction

C

either (a) and (b)

D

neither (a) or (b).

Text Solution

Verified by Experts

The correct Answer is:
A
The hose pipe has be held strongly as it tends to move backward due to strong force of reaction.
Promotional Banner

Topper's Solved these Questions

  • FORCES AND LAWS OF MOTION

    PRADEEP|Exercise MOCK TEST|36 Videos

  • FORCES AND LAWS OF MOTION

    PRADEEP|Exercise ASSESSSMENT THROUGH PAPER-PEN TEST|29 Videos

  • FLOTATION

    PRADEEP|Exercise Problem For Practice|6 Videos

  • GRAVITATION

    PRADEEP|Exercise Model Test paper (1)|36 Videos

Similar Questions

Explore conceptually related problems

While putting out fire, the fire men have hold the hose pipe tightly. Why?

While firing, a gun man has to hold the gun tightly against his shoulder. Why?

The havoc ofrecurring famines and the subsequentimpact of devastating floods are major impediments in the path of social and economic progress of India. No doubt, the nation has made great strides in the judicious use of water,whether it is irrigation to fulfil the objective of food security or water conservation for rain-fed crops or drinking water or ground water for industrial and agricultural purposes. How-ever, the demand for water is more than the available and sustainable supply. It is so because water resources are not managed by integrated suitable methods for multipurposes. There is no shortage of sustainable water for different uses in India.

Explain, why is it difficult for a fireman to hold a hose, which ejects large amount of water at a high velocity?

Water from the bottom of a dam of depth h comes out through a narrow pipe and strikes continuousy the tips of the blades of a water turbine. The length of each blade is R. Calculate the most advantaneous speed of rotation of the turbine [Hint : The most advantageous speed corresponds to the development of maximum power in the turbine]

An empty cylindrical tank having diameter 5 m is filled with water through a hose pipe having radius 25 cm. If pressure at the bottom of the container increases at a rate of 10^(3)"Pa s"^(-1) , calculate the speed of water flowing through the hose pipe. ("Take g 10 m s"^(-2))

A gardener holds a pipe of inside cross-sectional area 3.60 cm^(2) at a height of 1.50 m from ground. The opening at the nozzle of pipe has cross-sectional area 0.250 cm^(2) . Water velocity in the segment of the hose that lies on the ground is 50.0 cm//s . a. What is the velocity of water leaving the nozzle? b. What is the thrust force experienced by the gardener due to flow of water through nozzle. c. What is the water pressure in the hose on the ground?

PRADEEP-FORCES AND LAWS OF MOTION-MULTIPLE CHOICE QUESTIONS
  1. In Ques.8, the direction of acceleration is

    Text Solution

    |

  2. A swimmer swims due to

    Text Solution

    |

  3. A gun recoils on firing. This is due to

    Text Solution

    |

  4. Velocity of recoil of gun is much smaller than the velocity of bullet....

    Text Solution

    |

  5. What is the total momentum of the bullet and the gun before firing?

    Text Solution

    |

  6. Total momentum of gun and bullet before firing is

    Text Solution

    |

  7. A gun fires a bullet with a speed of 400m//s. What is recoil velocity...

    Text Solution

    |

  8. When a sailor jumps from a boat to the river bank?

    Text Solution

    |

  9. Flying of rockets and jet planes is explained on the basis of

    Text Solution

    |

  10. While extinguishing fire, the fireman has hold the hose pipe very stro...

    Text Solution

    |

  11. When reasultant of all forces acting on a body is zero, the forces are...

    Text Solution

    |

  12. A ball set roilling on the ground stops after sometime. This is due to

    Text Solution

    |

  13. Which of the following statement is not correct for an object moving a...

    Text Solution

    |

  14. According to the third law of motion , action and reaction

    Text Solution

    |

  15. A goalkeeper in a game of football pulls his hands backwards while hol...

    Text Solution

    |

  16. The inertia of an object tends to cause the object

    Text Solution

    |

  17. A passenger in a moving train tosses a coin which falls behind him. It...

    Text Solution

    |

  18. An object of mass 2kg is sliding with a constant velocity of 4ms^(-1) ...

    Text Solution

    |

  19. Rocket works on the principle of coservation of

    Text Solution

    |

  20. A water tanker filled up to 2/3 of its height is moving with a uniform...

    Text Solution

    |