After researching in pairs and completing your Web Quest, share your responses here! Remember that you are answering the question: What do an airplane and a windbag have in common?
Wednesday, September 24, 2008
If you are really thinking .....
Remember that you can use the resources to answer the second question! What other events/objects can be explained by the same principle?
5 comments:
Anonymous
said...
The long bag quickly inflates because air from the atmosphere is drawn into the bag from the sides along with the stream of air from your lungs. Here's the technical explanation: In 1738, Daniel Bernoulli observed that a fast moving stream of air is surrounded by an area of low atmospheric pressure. In fact, the faster the stream of air moves, the more the air pressure around the moving air drops. When you blow into the bag, higher pressure air in the atmosphere forces its way into the area of low pressure created by the stream of air from your lungs. In other words, air in the atmosphere is drawn into the long bag at the same time that you are blowing into the bag.
Helicpters use Bernoulli's principle to make the wings help lift the helicopter into flight. Witch you have to use to make the windbags blow up.They both have in commen is that they both use Bernoulli's priniple to actevate flight.
Did you even put your hand out as you were riding your bike or stick your hand out of the window as you were driving down the road in a car? Notice if the front part of your hand is higher, than the back part of your hand the force of the air pushes against your hand and forces it to rise. If the front part of your hand is lower than the back part of your hand the force of the air pushes against your hand and forces it down. An airplaine is the same thing.
5 comments:
The long bag quickly inflates because air from the atmosphere is drawn into the bag from the sides along with the stream of air from your lungs. Here's the technical explanation: In 1738, Daniel Bernoulli observed that a fast moving stream of air is surrounded by an area of low atmospheric pressure. In fact, the faster the stream of air moves, the more the air pressure around the moving air drops. When you blow into the bag, higher pressure air in the atmosphere forces its way into the area of low pressure created by the stream of air from your lungs. In other words, air in the atmosphere is drawn into the long bag at the same time that you are blowing into the bag.
Helicpters use Bernoulli's principle to make the wings help lift the helicopter into flight. Witch you have to use to make the windbags blow up.They both have in commen is that they both use Bernoulli's priniple to actevate flight.
Did you even put your hand out as you were riding your bike or stick your hand out of the window as you were driving down the road in a car? Notice if the front part of your hand is higher, than the back part of your hand the force of the air pushes against your hand and forces it to rise. If the front part of your hand is lower than the back part of your hand the force of the air pushes against your hand and forces it down.
An airplaine is the same thing.
they both trap air
they use pressure to push upward
they use air to "flutter"
lower presure is caused by the increased speed of the air over the wing.
Since pressure is higher beneath the wing the wing is pushed upward.
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