Newton's third law says: If an object has a force going forward, there has to be an equal force going backward. What's a real life example of this?
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25
How do wings generate lift?
The airfoil shape of a wing pushes air down and causes a pressure difference between the bottom and top of the wing.
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monster
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rocket
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fairy
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25
baam
Lose 15 points!
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20
What did Bernoulli say about fast and slow air?
Faster air exerts lower pressure, slower air exerts higher pressure
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heart
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gold
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fairy
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lifesaver
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15
If I put a water bottle with a balloon over it into a pot of boiling water, what happens to the balloon? Why?
The balloon will fill with air, because the hot water will heat the air in the bottle, causing it to expand and fill the balloon.
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5
A balloon with air inside of it is heavier than a balloon without air inside of it, true or false
true!
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10
Engines produce thrust by making a ____________ difference.
Pressure
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15
In order for a helicopter to hover in the air, all four forces of flight have to be ____________
Balanced / Equal
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15
What are the four forces of flight?
Weight, Lift, Drag, Thrust
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10
Air is constantly pressing on us in daily life, true or false?
True!
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5
Name one kind of engine
Piston engine, jet engine, rocket engine
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20
What happens to air when you heat it up?
The air particles move faster, air expands, air becomes less dense, and air rises
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eraser
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seesaw
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gift
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banana
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20
Which plane will experience less drag, and why?
Drag is caused by air resistance, or the rubbing (friction) of air against the surface of an object. The more air can pass over the object, the less drag!
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15
What would happen if you blew cold air inside a hot air balloon while it was flying?
