Accurate: Gravity Acceleration & Air Density

[xplane80]

I've noticed that algodoo's Gravity Acceleration & Air Density are not accurate.

Gravity = 9.8m/s^2 should be = 9.80665m/s^2 (or at least 9.81 or 9.807)
Air Density = 0.01kg/m^2 should be = 1.2041kg/m^3 (or 0.724928405kg/m^2)

[Mystery]

Supports +1

[KarateBrot]

The thing is that gravitational acceleration isn't the same at every point on earth. It can reach from 9.78m/s² up to 9.83m/s² so 9.8m/s² is alright.
For the air you are right I think.

[xplane80]

Yes equatorial gravity is 9.78 but the official ISO is 9.80665.

I don't how dense the air would be for a 2d analog so I've just esitmated 0.725kg/m^2 is about right (I hope).

[Joel]

9.8 is used as it gives a good estimation of gravity independent on where on earth you are. 9.80665 is a very specific place, where 9.8 is anywhere on earth. And an air density of 0.01 kg/m² is in accord with all other weights in Algodoo, such as those of materials.

[xplane80]

I know this. All I was saying is that air density is not that accurate. No one realises how heavy air actually is.