Sorry to ask another question :/
1. The problem statement, all variables and given/known data
Consider the change of momentum.
A wind (of speed v) acts perpendicularly to a wall. Show that the pressure do to this wind acting of the wall is v2ρ, where ρ is air density.
Hence show by suitable integration that the torque about the bottom edge of a vertical surface of height h and width x is given by 0.5v2ρLh2
If a wall has height 2m, thickness 0.3m, mass 1200kg per metre length, what is the wind speed needed to topple this?
Air density = 1.2 kgm-3
The attempt at a solution
Erm...
I think P=F/A will be useful here.
Mass will likely be substituted for ρ*V
But I have no idea where to go :(
Any tips appreciated
1. The problem statement, all variables and given/known data
Consider the change of momentum.
A wind (of speed v) acts perpendicularly to a wall. Show that the pressure do to this wind acting of the wall is v2ρ, where ρ is air density.
Hence show by suitable integration that the torque about the bottom edge of a vertical surface of height h and width x is given by 0.5v2ρLh2
If a wall has height 2m, thickness 0.3m, mass 1200kg per metre length, what is the wind speed needed to topple this?
Air density = 1.2 kgm-3
The attempt at a solution
Erm...
I think P=F/A will be useful here.
Mass will likely be substituted for ρ*V
But I have no idea where to go :(
Any tips appreciated
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