physics

posted by .

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?

  • physics -

    The force according to the Newton’s 2 Law is
    F= m•a=m•(Δv/Δt) =Δ(m•v)/ Δt
    If the length of the moving stream is L and the density of water is ρ, then
    F = (ρ•S•L•v)/(L/v) = ρ•S•v^2 =
    =1000• 50•10^-4•(0.3)^2=0.45 N

  • physics -

    faaaanx -xoxoa jo h.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    Water leaves the fireman's hose at rate of 7.2 kg/s and with a velocity of 21 m/s. Calculate the force exerted by the water jet on the wall of a building.
  2. mechanics

    Consider a jet of water striking a vertical wall horizontally a speed of v. After hitting the wall, the water moves along the wall. If the area of cross-section of the water jet is S, Find the force that it applies on the wall. Take …
  3. mechanics

    Consider a jet of water striking a vertical wall horizontally a speed of v. After hitting the wall, the water moves along the wall. If the area of cross-section of the water jet is S, Find the force that it applies on the wall. Take …
  4. Physics

    Supose the water flows out from a pipe at 3 kg/s & its velocity changs from 5 to 0 on striking wall then the force exrted by water on wall wil be?
  5. Physics

    In many locations, old abandoned stone quarries have become filled with water once excavating has been completed. While standing on a quarry wall, a boy tosses a piece of granite into the water below. If he throws the rock horizontally …
  6. physics

    A hose ejects water at a speed of 2m/s through a hole of area 0.01m2.if the water strikes a wall normally,calculate the force on the wall in Newtons,assuming the velocity of water nomal to wall is zero after collision.
  7. Physics

    A ball of mass 200g strikes a rigid wall normally at the speed of 25m/s and bounces with the same speed. Time of contact of the ball with the wall is 1s. calculate the change in momentum and the force exerted by the ball on the wall?
  8. Physics

    A stream of water flowing horizontally with the speed of 15m/s gushes out of a tube of cross-sectional area 10-2m2 and hits a vertical wall nerby. What is the force exerted on the wall by the impact of water assuming it does not rebound?
  9. physics

    water in a dam is 15 m deep. a horizontal pipe of 4 cm diameter passes through the wall of the dam below the surface of water. a plug secures the pipe opening. the frictional force between the plug and pipe wall is about?
  10. maths plz help!!

    A hose ejects water at 80cl/s through a hole 2mm in diameter.the water implinge a wall and drop off without rebounding.what is the force on the wall?

More Similar Questions