Fluids & Pressure
Buoyant Force
Float, Sink, and Density
Bernoulli’s Principle
Flight
100
Why does water exert more pressure than air?
1000x more dense
100
Where did Archimedes discover buoyant force?
In the bathtub
100
Sink or Float: Weight 100 N Buoyant Force 100 N
Float
100
What country was Bernoulli from?
Switzerland
100
This force is responsible for pulling the plane towards earth.
Gravity
200
If air flows from point B to point C, point B must be an area of what?
High Pressure
200
How do you determine the volume of an irregularly shaped object?
Water Displacement
200
An object will float as long as it’s density is _____ _____ the fluid its in.
Less Than
200
Fast moving air exerts ____ ____.
Low Pressure
200
When would it be important to increase an airplane’s drag?
Landing
300
Why do fluids exert pressure?
Motion of the particles
300
Right now, you are displacing an amount of air equal to what?
Your Volume
300
Adding salt to water increases it’s _____ therefore, _______ it’s density.
Mass, Increasing
300
Explain why the strip of paper was lifted when we blew air across it.
Fast air, low pressure
300
____ air flows over the top of a wing creating an area of ____ pressure.
Fast, low
400
Who is experiencing more atmospheric pressure right now, you or Ms. Capone’s class?
Ms. Capone’s class
400
Why is buoyant force an upward force?
Fluid pressure increases with depth
400
Steel’s density is much greater than seawater. How do we get aircraft carriers to float?
Change shape to displace enough water/lower density
400
When the space through which a fluid becomes narrow, fluid speed increases. Using this information, explain how two boats could collide.
Fast fluid, low pressure
400
Why is thrust important to flight?
It makes air flow over the wing.
500
Wind rushes towards the center of a hurricane. The center must be an area of?
Very low pressure
500
Buoyant force is equal to what?
Weight of the fluid displaced
500
What occurs when the buoyant force is greater than weight? Be specific.
Buoying up.
500
Explain why the two beach balls moved towards each other when the fan blew air between them.
Fast air, low pressure
500
Explain when air must move faster over the top of a wing.
Longer distance and nature does not like vaccums.
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