Register to reply

Bernoulli Principle Problem

by th3plan
Tags: bernoulli, principle
Share this thread:
Apr12-08, 09:54 PM
P: 92
1. The problem statement, all variables and given/known data

Find the lift in newtons due to the Bernoulli Principle on a wing of a plane of area 84.5 m^2 if the air passes over the top and the bottom surfaces at speeds of 347m/s and 289 m/s

2. Relevant equations

P1+(1/2)densityV^2 =P2+(1/2)densityV^2

3. The attempt at a solution

Ok so i know the density of air is 1.29kg/m^3

so i plug into equation to get

1/2(1.29kg/m^3)(347m/s)^2= 1/2(1.29kg/m^3)(289m/s)^2

then i get answer of 5.39x10^4 N/m^2

then i use equation F=PA

and P is 5.39x10^4 N/m^2 and A is 84.5m^2

to get answer of 4.6x10^6 N

Am i correct ?
Phys.Org News Partner Science news on
Experts defend operational earthquake forecasting, counter critiques
EU urged to convert TV frequencies to mobile broadband
Sierra Nevada freshwater runoff could drop 26 percent by 2100
Apr13-08, 12:51 AM
P: 83
By bernouili equation
Pa+1/2pva^2 = Pb =1/2pvb^2
1/2pvb^2-1/2pva^2 =Pa-Pb
deltaP = 1/2pvb^2-1/2pva^2
deltaP * A =Lift force
I think your method is correct

Register to reply

Related Discussions
-bernoulli principle in fan- Mechanical Engineering 8
Bernoulli Problem Introductory Physics Homework 4
Differential Equations - Bernoulli Problem Calculus & Beyond Homework 1
A-Level Investigation into Bernoulli Principle General Physics 0
Bernoulli Principle General Physics 1