What is the lift (in newtons) due to Bernoulli's principle on a wing of area 78 m2 if the air passes over the top and bottom surfaces of 260 m/s and 150 m/s respectively?
can you explain how to solve the problem? the teacher really didnt explain this part real well.
2007-11-30 06:34:04 · 2 answers · asked by Omar A 1 in Science & Mathematics ➔ Physics
Bernoulli's Equation says that
P + p g h + 1/2 p v^2 = Constant
where p = the density of the fluid.
For the airflow just above and just below the wing, the heights are the same, so what we have is
P_top + 1/2 p v_top^2 = P_bottom + 1/2 p v_bottom^2
The density of air is about 1.2 kg / m^3
You know the velocities
Find the difference in pressure between top and bottom
That difference in pressure = Force / Area
You have the wing area, so you can now calculate the lifting force.
2007-11-30 06:43:36 · answer #1 · answered by jgoulden 7 · 2⤊ 0⤋
bet your the life n soul of the party
2007-11-30 14:38:13 · answer #2 · answered by Anonymous · 0⤊ 2⤋