How Do Planes Fly

Q. What happens when air is blown between the two inflated balloons hanging by strings?

Q. jet air crafts typically fly at altitudes of approximately 10, 000 meters. atmospheric conditions at this altitude are different from those at ground level. write down one difference that exists and explain why it must be controlled for in order for people to survive inside jet air crafts

Q. An aeroplane stays in the air because:

1. The velocity of air above the wings is less than the velocity of air below the wings.
2. The velocity of air below the wings is less than the velocity of air above the wings.
3. The wings generate a thrust by expelling mass at low velocities.
4. The velocities of the air above and below the wings are perfectly balanced.

Q. The air speed above the airfoil is below the airfoil. Hence, the pressure above the airfoil is the pressure below.

1. lower than
2. equal to
3. greater than
4. opposite to

Q. Why does air rush out of a ballon when it is not tied properly

Q. The air speed above the airfoil is below the airfoil. Hence, the pressure above the airfoil is the pressure below.

1. lower than
2. equal to
3. greater than
4. opposite to