Download Fluid Pressure

Ch. 13.1
True
False
Statement
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
True
False
 The
result of force distributed over an area
A
 P
pascal, Pa
1kPa = 1000 Pa
 F-
N
 A- m2
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
True
False
Statement
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
True
False
Pascal’s Principle

A change in pressure
at any point in a fluid
is transmitted equally
and unchanged in all
directions throughout
the fluid
Hydraulic Systems
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 Lift
Lift- pressure
difference between
top and bottom of
wings creating an
upward force
 Birds, airplanes

Flight
Spray Bottles

Fast moving water
creates low pressure
at the top of the tube
Ch 13.3
True
False
Statement
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
True
False
 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