Ch. 13.1

TrueFalseStatementTrueFalse Pressure equals area/ force, and is measured in Pascals Pressure in a fluid increases as depth increases Air pressure decreases as altitude increases All liquids have the same density Depth and size of the container determine the pressure of a fluid

 The result of force distributed over an area

 P- pascal, Pa  1kPa = 1000 Pa  F- N  A- m2  A box with a weight of 2700 N rests on the ground. If the area of the box touching the ground is 1.5 square meters, what is the pressure on the ground?  Given:  Formula  Plug and Chug

 Fluid- substance assumes shape of container  Pressure increases as depth increases  Pressure at any given depth is constant, and exerts equally in all directions  Depends upon depth, and type of fluid

 Air pressure decreases as the altitude increases  101 kPa at sea level  Ex: Air plane, ridding up Mountains

Ch 13.2

TrueFalseStatementTrueFalse Bernoulli’s Principle says, as the speed of a fluid increases, the pressure within decreases Lift allows birds, and planes to fly-creating an upward force Pascal’s Principle says pressure in a fluid is greater at the source of pressure Hydraulic systems work due to Bernoulli’s Principle Spray bottles demonstrate Pascal’s Principle

Pascal’s PrincipleHydraulic Systems  A change in pressure at any point in a fluid is transmitted equally and unchanged in all directions throughout the fluid  Uses pressurized fluid acting on pistons to change force  Increases output force is produced due to a constant fluid pressure is exerted on the larger area of the output piston Hydraulic Clip Hydraulic Car

 As the speed of a fluid increases, the pressure within the fluid decreases Bernoulli's Clip

Wings and LiftSpray Bottles  Lift- pressure difference between top and bottom of wings creating an upward force  Birds, airplanes  Fast moving water creates low pressure at the top of the tube Flight

Ch 13.3

TrueFalseStatementTrueFalse Buoyancy results in the apparent weight gain of an object An object less dense than the liquid will float Archimedes's principle says the buoyant force of an object is equal to the weight of fluid displaced by the object An object with greater density than the liquid will sink An object with the same density of the liquid will float

 Buoyancy- ability of a fluid to exert an upward force on an object placed in it  Results in the apparent loss of weight of an object in a fluid  Upward force, acts opposite of gravity

 Buoyant force on an object is equal to the weight of the fluid displaced by the object

 If object is less dense than the fluid, it will float  If it is more dense, it will sink  If buoyant force is equal in weight, an object will float  If it is less than the weight it will sink

 Suspended  Object has same density as the fluid it is in  Sinking  Objects density is greater than the fluid it is in  Floating  Object has less density than the fluid it is in