Does airplanes fly using buoyancy?

It's not, it's the wing that tilts downwards to give the air a downward force, and thus the wing gets an upward reaction force.

No! This is because airplanes fly using the air pressure generated by the difference in air velocity on the upper and lower surfaces of the wings.

No! It uses jets and buoyancy generated by the wings.

It's flying with propulsive air! Rockets are propelled with combustion!

Due to the pressure difference between the upper and lower surfaces of the wing, the wing is lifted upwards by the air on the lower surface.

Department of Physics and Aerodynamics.

Students of the department are taught that airplane flying is based on Bernoulli's principle.

The principle says that the greater the air velocity, the lower the pressure, so the wing produces lift because the high velocity of the air flowing over the upper surface creates an area of low pressure and hence the lift.

Newton's First Law.

It is said that if there is no external force, a stationary object will remain at rest, and a moving object will remain in a straight line at a uniform speed. In other words, if you observe that the air flow is deflected, or if the air that was originally still begins to move, it must have a strong effect. Newton's third law.

It is said that any role exists in the opposite direction of the same size to accompany the cherry blossom spring to sing the praise. For example, if an object on a table exerts a force (gravity) on the table, the table must also exert a force of equal magnitude and opposite directions to the object to support the object. In order to generate lift, the wing must exert a certain effect on the air.

The result of the action of the wing on the air is to get lift as a reaction.

When the aircraft is flying in the air, the air flow speed above the wing is fast and the pressure is small, and the air flow speed under the wing is slow and the pressure is strong, resulting in an upward pressure difference, which is lift;

The airplane mainly uses the lift to fly in the air, not the air buoyancy

Therefore, the only answer is:

The upper wing of the aircraft protrudes, the lower part is straight This result determines that when the aircraft is started, the air flow speed above the wing is fast, the air pressure is small, and the air pressure direction is downward; The air flow velocity under the wing is slow, the air pressure is strong, and the air pressure direction is upward The two pressures collide with the trapped brigade to form an upward resultant force, and when the resultant force reaches a certain level, the aircraft can take off in the air Therefore, the force that makes the laughing bench aircraft rise is not buoyancy

Therefore, the answer is: the ruler is small; No!

It depends on buoyancy, but mainly on the pressure difference between the top and bottom of the plane.

I didn't pay attention to the problem, you said multiple-choice questions, then you see if the answer is pressure, if there is pressure and it is a single choice, then it is not buoyancy.

Write down the chosen answers. Supplement: Halo. Understood.

If you say it's relied on, don't choose, if you say it's .........There is no if, so I can only ask the question like this Add: It took an hour.

You just know the answer, I'm dizzy, you can just look at the answer.

Next time, I'll be able to explain the topic clearly. My friend, you.

I feel like I'm still going to say yes.

But if it's such a topic, it's very likely that you're wrong.

But he did rely on buoyancy. Supplement: The principle of take-off is the role of aerodynamics and air buoyancy.

According to the principle of hydrodynamics, when the aircraft slides, the air pressure on the upper side of the wing is less than that on the lower side, which causes the aircraft to produce an upward buoyant force. When the plane taxied to a certain speed, this buoyancy reached a force sufficient to make the plane fly. So, the plane went into the sky.

This is how airplanes take off. Therefore, the take-off of the plane depends on the buoyancy of the report.

- Found someone in the same camp. He said yes, too.

You ask this because you chose yes and the result is wrong? Or did you choose no, and the result was wrong? Addendum: You write down the whole question.

It's not difficult, but the way the question is ......

I support you in choosing it. Addendum: Adopted.

People combined airships and airplanes to form a variety of buoyancy planes. The buoyancy flight takes off like a normal chain aircraft. However, due to the fact that the lift of a buoyant aircraft is a combination of buoyancy and aerodynamics, its lift and load capacity are much larger than those of ordinary aircraft.

At present, the world's largest An-225 transport aircraft can carry up to 1,000 armed soldiers, while buoyancy aircraft can carry up to 10,000.

There are two 3 m * 2 m * 2 m pontoons under the aircraft, 1 2 are exposed when not loaded, and at least 1 4 are exposed when the load is late. Ask the maximum load of the aircraft.

Recommended answers. As can be seen from the title, the maximum load of the aircraft (which is also the least exposed surface of the pontoon) sinks a little more than when it is not loaded, and the corresponding displacement volume of this sinking is:

3 * 2 * 2) * 2 * (1 2-1 4) = 6m 3 pontoon volume * number of pontoons * sinking part of the proportional buoyancy of the law:

f=ρv=6*10^3kg

Load 6 tons back.

An airplane is subjected to air buoyancy when it takes off, but the lift of an airplane is not buoyancy.

The liftforce of the aircraft taking off has nothing to do with buoyancy; During the take-off phase, the aircraft relies on the take-off speed, the difference in airflow pressure between the upper and lower surfaces of the wings, that is, lift.

y=cy^1/2

v 2s—air density.

s — wing area.

cy—lift coefficient.

v—airflow velocity.

The effect of lift has nothing to do with buoyancy; The float of the seaplane is actually the buoyancy that holds up the fuselage when the aircraft is statically parked on the water surface, but in the take-off stage, the aircraft is completely completed by the take-off speed and the airflow pressure difference between the upper and lower surfaces of the wings, that is, the lift.

y=cy1/2

v 2s—air density.

s — wing area.

cy—lift coefficient.

v—airflow velocity.