Mechanical Properties of Fluids
Class 11 · Mechanical Properties of Fluids

Airplane Lift

Curved airfoil — air on top is faster, pressure lower → net upward force.

Run simulation

Key Notes

01

Curved upper surface forces air to travel a longer path → higher speed → lower pressure (Bernoulli).

02

Net pressure difference × wing area = lift force, perpendicular to airflow.

03

L = ½ρv²C_L A — depends on airspeed squared and angle of attack.

Formulas

Lift

C_L grows with angle of attack until stall.

Important Points

Doubling airspeed quadruples lift — but also drag.

Above stall angle (~15–18°), flow separates and lift collapses.

Airplane Lift notes from sciphylab (also known as SciPhy, SciPhy Lab, SciPhy Labs, Physics Lab). Class 11 physics revision for JEE Mains, JEE Advanced, NEET UG, AP Physics 1/2/C, SAT, and CUET-UG.