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### 52 Cards in this Set

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 the result of a force distributed over an area pressure Find pressure Force over area SI Unit Force Newtons SI Unit area Square meters (meters squared) The rulting unit of Force & area Pascal (Pa) who is the pascal named for? Blaise Pascal Where is Blaise Pascal from? France Pressures are often stated in kilopascals 1 kPa = ______ pa 1000 A substance tht assumed the shape of its container A fluid ____ and _____ are fluids Liquids and gasses Water pressure ____ as depth increases increases freebie yay Does teh shape of its container and the area of its bottom surface affect pressure? No What are two factors that determine the pressure a fluid exerts when it is not moving? Depth and the type of fluid The ____ of fluid measured in terms of volume or weight does not affect pressure amount The weight of the earth's atmosphere exerts a pressure of about ____ kPa at sea level. 101 Air pressure decreases as atmosphere ______ increases The atmosphere is exerting more than _____ newtons of force on the top of your head 1000 We are not crushed by air pressure because the inside of our bodies also exert pressure Balanced forces _____ and result in a net force of ____ cancel, zero If you squeeze a full bottle of water, pressure increases _____ throughout the water equally _____ is the science of applying pascal's principle Hydraulics A device that uses pressureized fluid acting on pistons of different sizes to change a force hydraulic system A change in pressure at iny point in a fluid is transmitted equally and unchanged in all directions throughout the fluid Pascals principle Input force is applied to... the small piston, which pushes against the fluuid sealed i the hydraulic system Pressure by the small piston is transmitted through the fluid to the large piston In a hydraulic lift system, ______ output force is produced because a constant fluid pressre is exerted on the larger area of the output piston increased The amount of input force increased depends on.. the area of the output pistons If the large piston has eight times the area of the small piston, then... the output force is 8x greater than the input force.. Because the pressure on each piston is the same.. the difference in force is related directly to their areas Daniel Bernoulli was from.. Switzerland As the speed of a fluid increases, the pressure within the fluid.. decreased (Bernoulli's principle) Paper goes up when blowed down upon Because the air below the paper is nearly motionless, it exerts a greater pressure, and the difference in pressure forces the paper upward Air travelling over the top of the wing moves ____ than air travelling underneath faster The air travelling faster over the top of thing wing creates a low-pressure area above the wing The pressure difference between the top and bottom of the wing creates an upward force known as lift some wings are used to create a _____ force downward Race cars upside down wing spoiler Spoiler downward force created by it pushes tires onto the road, giving the car better traction and allowing it to go around corners at higher speeds Forces that act on an airplane in flight Thrust, drag, lift, and weight The ability of a fluid to exert an upward force on an object placed in it buoyancy Beuoyancy results in the apparent loss of weight of an object in a fluid Upward force which acts in the opposite direction of gravity buoyant force ancient greek mathemetician Archimedes The buoyant force on an object is equal to the weight of the fluid displaced by the object Archimedes principle Floating objects displace.. a volume equal to the volume of the oart if the object submerged SI unit density grams per cubic centimeter (g/cm to the third) Density of water 1 g/cm to the third If an object is less dense than the fluid it is in, it will _____. If it is more dense, it will ______ float, sink When the buoyant force is equal to the weight, the object ____. When it is less than the weight, the object _____ floats or is suspended sinks What do submarines do to sink, float, or stay suspended in water? Fill/ Empty their ballast tanks with water