Chapter 20, Problem 25A

Calculate the lift on a model airplane wing with an area on one side of $100c{m}^2$ and a difference in air pressure above and below the wing of $0.01N/c{m}^2$.

To determine

Lift on a model airplane wing.

Answer to Problem 25A

The lift on the model airplane wing is $F=1\text{N}$ .

Explanation of Solution

Given:

Area on one side, $A=100{\text{cm}}^2$

Difference in air pressure above and below the wing, $P=0.01{\text{N/cm}}^2$

Formula Used:

The pressure is given as,

  $P=\frac{F}{A}$

Where, $F$ is force and $A$ is area in contact.

Calculation:

On substituting the given values in above formula,

  $\begin{array}{l}0.01{\text{N/cm}}^2=\frac{F}{100{\text{cm}}^2}\\ \Rightarrow F=0.01\times 100\text{N}\\ \Rightarrow F=1\text{N}\end{array}$

Conclusion:

Therefore, the lift on the model airplane wing is $F=1\text{N}$ .