Homework Help: physics

Posted by Anonymous on Thursday, December 3, 2009 at 8:47pm.

What is the net upward force on an airplane wing of area 20.1 m2 if the speed of air flow is 302 m/s across the top of the wing and 287 m/s across the bottom? (assume the density of air is 1.29 kg/m3)

physics - MathMate, Thursday, December 3, 2009 at 11:10pm
Using Bernoulli equation:
P+(1/2)ρV²+ρgh=constant.
We get
P1+(1/2)ρV1²=P2+(1/2)ρV2²
ρgh being constant.

Thus
P2-P1=(1/2)ρ(V1²-V2²)
=(1.293*g)*(302²-287²)
=111,952 N/m²
The net upward lift
=111,952*20.1 N/m² m²
=2.25*10⁶ N

Compare with the weight of a Boeing 747-8:
442,000 Kg= 4.33*10⁶ N.

Answer this Question

Related Questions

physics - Find the pressure difference on an airplane wing where air flows over ...
physics - (a) Find the pressure difference on an airplane wing where air flows ...
physics - (a) Find the pressure difference on an airplane wing where air flows ...
Physics - An airplane wing is designed so that the speed of the air across the ...
Physics - An airplane is moving through the air at a velocity v = 227 m/s. ...
physics - Modern airplane design calls for a lift, due to the net force of the ...
College Physics - Modern airplane design calls for a lift, due to the net force ...
Physics - Use Bernoulli's equation to estimate the upward force on an ...
Physics 1 - Consider an airplane wing of area 15 m2. The airflow speed over the ...
Physics - On a particular airplane wing, air flows over the upper surface with a...

For Further Reading

First Name:
School Subject:
Answer: