Skip to main content

How does an AIRPLANE FLY ?

Flight is basically a battle against Earth's gravity, and your greatest ally is the air. Birds and planes, alike, fight gravity by manipulating the air molecules around them. When birds flap their wings, they're generating an area of high air pressure under the wing and low air pressure above it.
The same happens when planes race down the runway. The pressure difference above and below the wing creates a net upward force, giving the aircraft lift. Once this upward force exceeds gravity's downward pull, you have liftoff! Of course, a 1 million-pound plane needs greater lift to get off the ground than a great bustard.




All other credits to the rightful owners.


Comments

Post a Comment

Popular posts from this blog

What is a Harvest Moon ?

The Harvest Moon is the full Moon nearest the start of fall or the autumnal equinox. This usually means it coincides with the September full Moon, though it can also fall nearer to the October full Moon, occurring anywhere from two weeks before to two weeks after the equinox. In  2017 , the Harvest Moon will rise on  October 5  at 2:40  P.M. EDT. WHY IS IT CALLED THE HARVEST MOON? For several evenings, the moon rise comes soon after sunset. This results in an   abundance of bright moonlight early in the evening , which was a traditional aide to farmers and crews harvesting their summer-grown crops. Hence, it’s called the “Harvest” Moon! CREDITS -  1)  https://www.almanac.com/content/what-harvest-moon 2) http://news.nationalgeographic.com/2017/10/when-is-harvest-moon-october-space-science/ YOUTUBE LINK -  https://www.youtube.com/watch?v=tJT...
Post a Comment
Read more

What is Archimedes’ principle ?

Archimedes’ principle states that  any body completely or partially submerged in a  fluid  ( gas  or  liquid ) at rest is acted upon by an upward, or buoyant,  force  the magnitude of which is equal to the weight of the fluid displaced by the body. The volume of displaced fluid is equivalent to the volume of an object fully immersed in a fluid or to that fraction of the volume below the surface for an object partially submerged in a liquid. The weight of the displaced portion of the fluid is equivalent to the magnitude of the buoyant force. The buoyant force on a body floating in a liquid or gas is also equivalent in magnitude to the weight of the floating object and is opposite in direction; the object neither rises nor sinks.  EXAMPLE  -  a ship that is launched sinks into the ocean until the weight of the water it displaces is just equal to its own weight. As the ship is loaded, it sinks deeper, displacing more water, and so t...
Post a Comment
Read more

What is a Black Hole ?

A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can't see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars. A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole. Scientists can study stars to find out if they are flying around, or orbiting, a black hole. When a black hole and a star are close together, high-energy light is made. This kind of light can not be seen with human eyes. Scientists use satellites and telescopes in space to see the high-energy light. Scientists think the sm...
Post a Comment
Read more