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WorksheetsChapter 13- Fluid Pressure
Total questions: 60
Worksheet time: 59mins
When pressure is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid. This fact is called________.
Pascal's Principle
Newton's Principle
Archimedes' Principle
Bernoulli's Principle
What is the SI unit use for hydraulic pressure?
Kg/m3
Pa
Litre
Kilometer
What is the formula for pressure?
P=A/F
P=FA
P=F/A
To calculate pressure you need to know ...
Force & Volume
Density & Volume
Power & Area
Force & Area
The pressure resulting from a force of 50 N exerted over an area of 5 m2 is
10 N
0.1 N
10 N/m2
0.1 Pa
A person wearing boots and a person wearing stilleto heels stand on a wooden floor. They both have the same weight. Which person exerts a greater pressure on the floor?
boots because they have a larger surface area
stiletto heels because they have a larger surface area
boots because they have a smaller surface area
stiletto heels because they have a smaller surface area
In what direction(s) does air exert pressure?
everywhere
no where
there is no pressure
downward
When force increases...
pressure increases
pressure decreases
pressure stays the same
pressure increases then decreases
When area increases...
pressure increases
pressure decreases
pressure stays the same
pressure increases then decreases
Any substance that can easily flows and therefore can easily change shape.
Fluid
Liquid
Gas
Solid
The amount of water pressure that you experience in a pool depends on
your buoyancy
the size of the pool
the volume of water
how deep you are in the water
The buoyant force acting on an object is equal to
the object's mass
the object's volume
the mass of the fluid displaced by the object
the weight of the fluid displaced by the object
A partially submerged object floats when
the object's weight is equal to the buoyant force
the object's mass is equal to the buoyant force
the object's weight is greater than the buoyant force
the buoyant force is downward
Archimedes' Principle states____
the buoyant force of an object is equal to the weight of the fluid that it displaces
when the speed of a fluid increases, the pressure exerted by the fluid decreases
pressure applied to a fluid is transmitted unchanged throughout the fluid
the buoyant force of an object is greater than the weight of the fluid it displaces
A fluid is a substance that can easily
freeze
thaw
flow
break
Fluids move from areas of _____ pressure to areas of _____ pressure.
high, low
low, high
static, high
static, low
The amount of mass per unit of volume
density
mass
weight
pressure
The density of a rock, compared to the density of water, is:
less
equal
greater
the same
This principle states that the pressure in a moving stream of fluid is less than the pressure in the surrounding fluid
Bernoulli's Principle
Pascal's Principle
Newton's Laws
Archimedes' Principle
Water pressure is the same at the bottom of the ocean as it is at the surface.
TRUE
FALSE
The density of an object has no effect on buoyancy.
TRUE
FALSE
When you sit in a bathtub and the water rises, that is an example of which principle?
Archimedes'
Bernoulli's
Pascal's
_________ explains why a ship floats.
Archimedes'
Pascal's
Bernoulli's
A force is applied in a closed container, the pressure increases the same amount. EX: squeezing a water bottle or toothpaste
Archimede's Principle
Pascal's Principle
Bernoulli's Principle
What principle is this hydraulic press showing?
Archimedes' Principle
Bernoulli's Principle
Pascal's Principle
Principle Testa
Why is the top of an airplane wing curved?
To create an area of low pressure above the wing
To create an area of high pressure above the wing
To create equal pressure above and below the wing
To make the wing look really cool
The upward force exerted by a liquid on an object immersed in or floating on the liquid
pressure
buoyant force
normal force
gravity
If an object sinks in a fluid, _____.
the density of the fluid is greater than the density of the object
the density of the fluid is less than the density of the object
the density of the fluid is equal to the density of the object
density has nothing to do with whether an object sinks or floats, only which state of matter the object is
If an object has a density of 3.6 g/mL and you put it into water (density =1.0g/mL,) will it sink or float?
sink
float
If you double the size of the larger pad of a hydraulic system, how much less force do you need to apply to the smaller pad to achieve the same result?
1/4 the force
1/3 the force
1/2 the force
The same amount of force
A substance has a mass of 16 g and a volume of 4 cubic cm, what is it's density?
64 g/cm3
20 g/ml
4 g/cm3
12 g/cm3
As the velocity of the fluid increases, the pressure exerted by the fluid decreases is stated in
Archimedes' principle.
Bernoulli's principle.
Charles' law.
Pascal's principle.
Which of the following devices operates based on Pascal's Law?
Hydraulic lift
Electric motor
Steam engine
Wind turbine
What happens to the pressure in a fluid at rest when the depth increases?
It remains constant
It decreases
It increases
It fluctuates
Which scientific instrument uses Pascal's Law to measure atmospheric pressure?
Barometer
Thermometer
Hygrometer
Anemometer
In a hydraulic press, if the output piston has an area 5 times larger than the input piston, what is the force multiplication factor?
5
10
1
0.2
What is a hydraulic system?
A system that uses a liquid under pressure to transmit a force to do work.
A system that uses a gas under pressure to transmit a force to do work
Pascal's law.
It uses water to push an object.
As the speed of a fluid increases, the pressure within the fluid decreases.
Archimedes' principle
Bernoulli's
principle
Newton's
principle
Pascal's
principle
The upward force acting on the wind of an airplane in flight.
(a)
Which of the following statements is true about an airplane wing during flight?
air above the wing travels faster than air below the wing
air below the wing travels faster than air above the wing
the wing exerts pressure equally in all directions
the lift acting on the wing reduces the weight of the wing
In a hydraulic lift system, an increased output force is produced because a constant fluid pressure is exerted on the larger area of the output piston.
true
false
Look at the pressure triangle. How do we calculate the area?
f ÷ a
f x p
p x f
f ÷ p
What does pressure measure?
Strength
Force exerted on a given area of surface
Which comparison is correct
F1 < F2
F1 > F2
F1 = F2
The diagram shows a hydraulic pump. Which comparison is true?
The force, F is the same as the weight of the load
The force, F is greater than the weight of the load
The pressure on piston P is the same as the pressure on piston Q
The pressure on piston P is smaller than the pressure on piston Q
According to Bernoulli's Principle, when the wind speed is low, wind pressure is ________
high
low
not enough information
None of the above
The faster a fluid moves, the lower the pressure is in the moving fluid compared to the fluid not moving as fast. This is called
Newton's Laws
Bernoulli's Principle
Wright Brothers Priciple
What is the best depiction of Bernoulli's principle below?
As the pressure of a fluid decreases, the speed increases
As the pressure of a fluid increases, the speed increases
As the pressure of a fluid decreases, the speed decreases
Bernoulli's principle creates ___ in airplanes
Drag
Lift
Weight
Friction
If you blow air between these two balloons, the pressure between the balloons would_________.
Increase
Decrease
Stay the same
A solid object has a mass of 10 kilograms and is resting on a horizontal surface. What is the pressure on the surface in pascals, if the surface area of contact is 0.2 square meters? (write your answer as a whole number)
(a)
A solid object has a pressure of 400 pascals and is resting on a horizontal surface with an area of contact of 0.1 square meters. What is the force exerted by the object in newtons? (write your answer as a whole number)
(a)
A solid object has a mass of 20 kilograms and is resting on a horizontal surface. The pressure on the surface is 600 pascals. What is the area of contact of the object with the surface in square centimeters? (write your answer as a whole number)
(a)
A container is filled with a liquid of density 800 kg/m3 and has a height of 3 meters. At what pressure in pascals is the bottom of the container subjected to? (write your answer as a whole number)
(a)
A car tyre runs over a nail which makes a hole in it. The air in the tyre leaks out. Why does the air leave the tyre?
The pressure inside the tyre is greater than the pressure outside.
The pressure inside the tyre is less than the pressure outside.
The temperature inside the tyre is greater than the temperature outside.
The temperature inside the tyre is less than the temperature outside.
Some gas in a sealed plastic bag is cooled.
How do the gas molecules behave when this happens?
A They move more quickly and become closer together.
B They move more quickly and become further apart.
C They move more slowly and become closer together.
D They move more slowly and become further apart.
A sealed gas cylinder is left outside on a hot, sunny day. What happens to the average speed of the molecules and to the pressure of the gas in the cylinder as the temperature rises?
A
B
C
D
The diagram shows a sealed jar containing a gas. Which statement about the gas in the jar is correct?
A The gas molecules collide with the inside of the jar more often as the temperature increases.
B The gas molecules move more slowly as the temperature increases.
C The pressure of the gas decreases as the temperature increases.
D The pressure of the gas is lower at the top of the jar than at the bottom of the jar.
