The calculated velocity for lifting a person in a wind tunnel is significantly low due to the mass of air and its interaction with gravity. The formula used, mass of air multiplied by velocity equals mass of man multiplied by gravity, yields a velocity of 0.06 m/s when using a mass of air of 10,000 kg. This calculation does not account for the actual air resistance and the effective mass of air interacting with a person. In practical applications, such as indoor skydiving, air velocities around 100 mph can effectively suspend individuals.
PREREQUISITESStudents studying physics, engineers interested in aerodynamics, and anyone curious about the mechanics of wind forces on objects.
It depends on the size of the wing...Suyash Singh said:
i was talking about thunderstormberkeman said:
Looks like 60-80mph is pretty close to the limit...Suyash Singh said:
I thought thatcjl said:
Hey, who you calling "nobody"?!cjl said:
I meant directly addressing the calculation rather than the end result. You did address a number of the factors thoughberkeman said:Hey, who you calling "nobody"?!
Momentum isn't the worst place to start here, but I'll address that more after we look at the mass some more. 10,000 kg is about right if you're looking at the entire column of air from the ground up to space, but what bearing would that have on its ability to lift a person? If a person is standing in the wind, what mass of air actually interacts with them?Suyash Singh said:
On that track you will find out what happens when you hit somebody with 10 tons of air in one go. (But the equation is still wrong.)Suyash Singh said:
conservation of momentumRive said:
That's an excellent tool for collisions, for example: but for this, you better to swim instead.Suyash Singh said:
