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26 Cards in this Set
- Front
- Back
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The pressure exerted by a fluid _______ as depth increases
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increases
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A fluid exerts an upward __________ ____________ on any object placed in the fluid.
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buoyant force
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The force per unit area that is applied on the surface of an object
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Pressure
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The gravitational force between an object and Earth
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Weight
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Formula for Pressure
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P (in pascals) = F (in newtons)/ A ( in meters squared)
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Formula for Weight
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W=mass x a (due to gravity 9.8m/s2)
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Any substance that has no definite shape and has the ability to flow.
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fluid
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The pressure on all objects in a fluid is exerted parallel/perpendicular to the surface, no matter what the shape. (Choose one)
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Perpendicular
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The fluid you are constantly surrounded by exerting pressure on you is called what?
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Atmospheric Pressure
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Why don't you feel atmospheric pressure?
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Because of the counter pressure of bodily fluids pressing back
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Used to measure atmospheric pressure
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Barometer
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The buoyant force pushes an object in a fluid upward. What pulls the object downward?
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Gravity
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Does buoyant force change based on the shape of the object?
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Yes, increasing the surface area, increases the buoyant force.
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Name the Principle:
The buoyant force on an object is equal to the weight of the fluid it displaces |
Archimedes Principle
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Density
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the mass of the object divided by the volume it occupies;
D (in g/cm3) = m( in g) / v ( in cm3) |
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An object sinks when the buoyant force is less than/more than the objects weight. (Choose one)
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less than, the weight causes it to sink
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An object floats when the buoyant force is equal to/more than the object weight. (Choose one)
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equal to, once the object has displaced as much water as its weight (Archimedes Principle) it will float.
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The SI unit of pressure
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pascal
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Name the Principle:
When a force is applied to a fluid in a closed container, the pressure in the fluid increase everywhere by the same amount. |
Pascal's principle
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uses a fluid to increase an input force, and the fluid enclosed transfers pressure from one piston to another
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Hydraulic System
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Name the principle:
When the speed of a fluid increases, the pressure exerted by the fluid decreases. |
Bernoulli's Principle
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An airplane wing forces air to be directed downward. What is the upward air reaction force on the wing called.
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Lift
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a pascal =
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1 N/m2
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gravity =
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9.8 m/s2
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True or False: A small narrow graduated cylinder holding the same amount of liquid as a taller and wider graduated cylinder will exert more pressure on the cylinder.
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True
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How many pascals does the atmosphere exert at sea level
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100,000
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