Converting kN/m2 to either mph or m/s

[ironictwist]

Any ideas? It's driving me effin insane

Want to convert 2.353kN/m2 & 1.5kN/m2 into either to m/s or mph.

Failing that...Convert 80, 100, 150mph into kN/m2.

HELP!

[ironictwist]

mcdjl said:

Isn't kN/m2 a force? If so that means that it won't translate into a speed unless you know what its pushing (in which case i think you'll actually get the acceleration)?

Indeed...I've got the weight in kg, it's near 1/4 of a ton but I'm trying to calculate the equivalent wind speed for this amount of force hitting a glass balustrade :/

[ironictwist]

RDE said:

Do you mean you want to work out what wind speed is causing that pressure?

Drag = 0.5 x rho x V^2 x S x Cd

V is the value you're looking for.
S is the area, but you have a pressure, so Drag/S is the pressure value you've obtained.
rho is the density of the air (in the region of 1.2)
However you won't know the coefficient of drag, Cd. And i'm not sure how to estimate it.

So that's where my usefulness (such as it was) ends.

If the cd = the area on which the force is focused on...If I said 990mm height x 900mm wide, would that help?

but to answer your 1st question...That's exactly what I'm trying to find.

Edited by ironictwist on Friday 5th June 15:14

[ironictwist]

Galileo said:

tonyvid said:

Galileo said:

stuff

I'm sure you can work the rest out for yourself.

HTH

I'm sure I couldn't!

tonyvid said:

Galileo said:

stuff

I'm sure you can work the rest out for yourself.

HTH

I'm sure I couldn't!

Must try harder!!

If Vp = 0.6V² then V= square root of Vp over 0.6

If Vp = 2.353 Kn/m² = 2353 n/m²
then,
V=62.6232 m/s = 140.0841mph

If Vp = 1.500kn/m² = 1500 n/m²
then,
V= 50m/s = 111.8468mph

Thats how I see it. So I'll sit here and wait for the night shift to say otherwise.

I owe you one ...Google failed me, but PH didn't.

Thanks! I knew I could rely on this place!