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Nikolay Zhivotenko2016-02-02 20:04:09
Physics
Nikolay Zhivotenko, 2016-02-02 20:04:09

How to determine the pressure, knowing the load?

Good day. Kindly, tell me how to determine the pressure in pascals, knowing the load in kilograms per square meter.
There is a formula
P=(1.2 * f * p * V^2)/2
where f=2 - safety factor
p - air mass density (kg * s^2 / m^4)
V - speed (m/s)
P - load (kg / m ^ 2)
I decide and get P = 11320 kg / m ^ 2
But it is necessary to find the pressure that this load will create. The problem is that the pascal is essentially a kilogram-force per area. And not just a kilogram-mass. Would it be correct to multiply the resulting value by the acceleration of gravity (g) and get kgf?
After all, F \u003d m * g

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Alexey selftrips.ru, 2017-12-02
@selftrips

I don’t know what the coefficients are 1,2 and f, but this is just a formula for dynamic pressure. Substitute the values ​​in some system of units and get the answer in the same system of units.
as for F \u003d m * g, it has nothing to do with gravity, and there are also a bunch of completely different formulas for force for other fields (electrical weak strong) and situations (for example, rotational motion, there will be a different formula)
And you can also see " dimension"
F = m*g here the dimension is kg*m/s2 => P=(kg*m/s2)/m2=kg/(m*c2)
P=(1.2 * f * p * V^2) /2 (kg/m3)*(m/c)2=kg/(m*c2)
the last expressions are the same! Witchcraft is no different!!!)))

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