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Gravitation pulls everything down (people, rocks, birds, planes..) It takes a force to counter the pull of gravity; in birds' case, it's lift from the birds wing. As air flows past the wing the fact that the length of chord of the upper wing is slightly longer then the length of the chord of the bottom of the wing - this induces a difference in flow speed and creates a slight upward force called lift.
The faster a bird goes, the higher the lift (to a limit.) The longer the wing, the more lift is generated - this is why bird with very long wingspans can travel long distances and go very high compared to birds with shorter wings.*If a bird's wing cannot generate enough lift, the bird will fall to the ground: they must overcome the pull of gravity.
* Note - high speeds are counter to large wings, hawks have shorter and swept vs broad wings on Eagles. The Eagles can go higher and longer, but the Hawks can go faster for short periods of time.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoThey have hollow bones and flap their wings which uses Newton's Law that every action has an equal and opposite reaction so they are propelled upward and then they glide on the air.
Wiki User
∙ 9y agoit does, but they flap their wings to lift them up
Wiki User
∙ 8y agoWhen a bird is in flight the air moving over its wings creates an upward force called lift, which counteracts the force of gravity that pulls down on the bird.
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Is the urine moved down to the ureters into the bladder by gravitational pull alone?
False
What has a higher gravitational pull the equator or the north pole?
The gravitational pull of the earth is pretty much the same anywhere between the poles and the equator creating a centripetal force pulling things in towards the earth.. However, the rotation of the planet results in an outward centrifugal force pushing things away from the earth. This force is greatest at the equator. Even though the gravitational pull is the same everywhere, the centrifugal force at the equator gives the impression of a very slightly lower gravitational pull.
How does the Moon affect Earth Tides?
The moon affect the ocean tides because of the gravitational pull that the moon has. Where the is a high tide, the moon is pulling the water toward it's gravity. The water on the opposite side of Earth, will pull away from the moon.
How does the outer core of the earth produce the earth's gravitational pull?
Gravitation is towards the center of the Earth, but this is just the combined force of different parts of planet Earth pulling us in different direction.Gravitation is towards the center of the Earth, but this is just the combined force of different parts of planet Earth pulling us in different direction.Gravitation is towards the center of the Earth, but this is just the combined force of different parts of planet Earth pulling us in different direction.Gravitation is towards the center of the Earth, but this is just the combined force of different parts of planet Earth pulling us in different direction.
When pulling a vacuum on a refrigeration unit how many microns should you pull it down to?
500
Why are astronauts taller in space than earth?
They do not have the gravitational pull pulling their spines down in space.
Why the birds and aeroplane are not pulling by gravitational pull of earth?
Because upthrust is greater than gravity, therefore, it stays in the air. Also, the power of the engines/wings hold them up.
Which is the source of energy that moves a wagon if they pull it on a flat sidewalk?
gravitational energy pulling on the wagon
We know that the gravitational force of the earth pulls objects down we see them fallin down but don't see objects moving up Why?
gravity is pulling not pushing but to settle this mater the reason we have low tide high tide is because of the moons gravitational pull in the water.
How does the space station stay in orbit?
Earths gravitational pull tries to pull it towards itself, but ends up pulling it in a large circle around it.
What is the different between push and pull?
When you "PUSH" then you are going against "Gravitational Force" but when you are "PULLING" then you are going against force.
Why gravitational acceleration decreases when moving earth deep?
As you go down the Earth, there is less matter below you, pulling you down, and more matter above you, pulling you up. (However, the first few kilometers the gravitational force will increase, due to the fact that the Earth is more dense in the center - and you get closer to that center.)
What is the name of the force holding us to the ground?
Gravitational pull. It is pulling us towards the centre of the Earth. It is not visible . In space there is no gravitational force so we fly in space
What is the difference between push and pull factors?
When you "PUSH" then you are going against "Gravitational Force" but when you are "PULLING" then you are going against force.
What force pulled the satellite down to earth?
Earth's gravitational pull
How can a bird wings and human arm look and function so differently when the same basic tissue that construct them?
Birds Are Made To Fly.Their Wings Are Bigger In Size Than Their Body.Birds Are Of Light Weight And Due To Continuation Of Flapping Of The Wings The Earth's Gravitational Pull To Doesn't Effect Them Too Much,Whereas Human Body Is Heavier Than The Birds,So The Gravitational Pull Pull's Us Down Hence The Humans Can't Fly In The Air
Is the urine moved down to the ureters into the bladder by gravitational pull alone?
False
