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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5
Air can be compressed, true or false?
True
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10
What is an airfoil?
The common shape of a wing, that helps it generate lift.
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baam
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fairy
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gift
Win 20 points!
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banana
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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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5
What kind of force do engines produce?
Thrust.
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15
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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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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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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15
What are the four forces of flight?
Weight, Lift, Drag, Thrust
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5
Name one kind of engine
Piston engine, jet engine, rocket engine
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15
What is air pressure?
the force of air on surrounding objects (higher pressure = more force)
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baam
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seesaw
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fairy
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thief
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trap
No points!
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star
Double points!
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fairy
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baam
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10
Piston engines turn a set of small wings called ___________ to produce thrust