Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Air Foil and Speed
Name: dee
Status: educator
Age: 40s
Location: N/A
Country: N/A
Date: 1999 

If a jet in the air increases its speed, does the downward force of air on the top of the wings increase or decrease? Does the net lifting force of the air on the wings increase or decrease?

The downward force decreases, and the net lifting force increases.

Tim Mooney

Increase... if all else remains the same.

Reading more about Bernoulli's principle would help understand this.

Larry Krengel


I guess increasing the speed will lift the jet up. My reasoning is that before the increase there is some uplift force that balances the weight of the jet, keep it level. The uplift force is directly related to velocity. If speed is increased, the uplift force is increased.


Dr. Ali Khounsary
Advanced Photon Source
Argonne National Laboratory

Click here to return to the Physics Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory