why is it difficult for a fire fighter to hold a hose that ejects large amounts of water at high speed?

  1. 👍
  2. 👎
  3. 👁
  1. The hose experiences a backward reaction force equal to the rate that water momentum leaves the nozzle. The walls of the hose must exert this force on the water to direct it out the nozzle, and the hose feels the reaction force. If the water came straight from the hydrant to the nozzle, then there would not have to be a large force, but this is almost never the case.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A fighter pilot is exposed to an acceleration of 3g in the horizontal direction during takeoff. Knowing that 1g=9.8 m/s2 and that the mass of the fighter pilot is 63.6 kg, what force (in Newtons) does the fighter pilot experience

  2. physics

    A fire engine must lift 30 kg of water a vertical distance of 20 m each second. What is the amount of power needed for the water pump for this fire hose? P=W/t=Fd/t=mgd/t (30)(9.8)(20)/1= 5880 W is that right?

  3. physics

    A 15.5-m length of hose is wound around a reel, which is initially at rest. The moment of inertia of the reel is 0.42 kg · m2, and its radius is 0.170 m. When the reel is turning, friction at the axle exerts a torque of magnitude

  4. physics

    a hose pipe ejects water at a speed of 0.3m/s through a hole of area 50 cm*m.if the water strikes a wall normally, calculate the force on the wall , assuming the velocity of water normal to the wall is zero after striking?

  1. physics

    A fire hose ejects a stream of water at an angle of 35.0º above the horizontal. The water leaves the nozzle with a speed of 25.0 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose

  2. Physics

    A fireman d = 33.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of θi = 21.0° above the horizontal as shown in the figure. If the speed of the stream as it leaves the hose is

  3. physics - fluids

    A fire hose exerts a force on the person holding it. This is because the water accelerates as it goes from the hose through the nozzle. How much force is required to hold a 7.5 cm diameter hose delivering 450 L/min through a

  4. Division/math

    Q. Each fire hose at the La Salle Fire Station is 25 yards long. The station needs enough fire hoses to reach from any hydrant to the farthest house, which could be up to 230 away. What is the minimum number of hoses that the La

  1. Physics

    A fire hose 10 cm in diameter delivers water at the rate of 23 kg/s. The hose terminates in a nozzle 3.1 cm in diameter. (a) What is the flow speed in the hose? (b) What is the flow speed in the nozzle?

  2. Physics

    A firefighter 41.8m away from a burning building, directs Zach stream of water from a ground level fire hose at an angle of 33.0 degrees above the horizontal . If the speed of the streams it leaves the hose is 42.7m/s, at what

  3. Physics

    A sound of constant frequency is produced by the siren on top of a firehouse. Compared to the frequency produced by the siren, the frequency heard by the fire fighter approaching the fire house is what?

  4. math

    The path of water from a hose on a fire tugboat can be approximated by the equation y = −0.006x2 + 1.2x + 10, where y is the height, in feet, of the water above the ocean when the water is x feet from the tugboat. When the water

You can view more similar questions or ask a new question.