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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 is this??
Vacuum sealed chicken!
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15
×
What are the four forces of flight?
Weight, Lift, Drag, Thrust
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×
seesaw
Swap points!
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seesaw
Swap points!
Okay!
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rocket
Go to first place!
Okay!
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thief
Give points!
5
10
15
20
25
×
thief
Give points!
5
10
15
20
25
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gold
Win 50 points!
Okay!
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shark
Other team loses 20 points!
Okay!
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banana
Go to last place!
Oops!
20
×
What did Bernoulli say about fast and slow air?
Faster air exerts lower pressure, slower air exerts higher pressure
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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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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
×
What kind of force do engines produce?
Thrust.
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15
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Racing cyclists often bend their head down low. Why do they do this?
Bending their head down reduces the area of their body that is exposed to the air. This means less air resistance, and less drag.
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15
×
What is air pressure?
the force of air on surrounding objects (higher pressure = more force)
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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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heart
Other team wins 5 points!
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gift
Win 20 points!
Okay!
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rocket
Go to first place!
Okay!
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baam
Lose 25 points!
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5
×
Air can be compressed, true or false?
True
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20
×
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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15
×
What's an example of a flying aircraft with no engine?
glider, hang glider, flying squirrel, paper airplane, etc.
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