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WorksheetsForces in Fluids
Total questions: 40
Worksheet time: 39mins
Name
Class
Date
1.
This is the name of the force that tries to push an aircraft up.
a)
Thrust
b)
Weight
c)
Drag
d)
Lift
2.
Faster air movement over an airfoil creates a _________ pressure field, which in turn allows lift.
a)
Higher
b)
Lower
3.
This force slows a plane down. It is caused by air friction on the plane.
a)
lift
b)
thrust
c)
weight
d)
drag
4.
This force is a measure of gravity which wants to pull the plane down towards the earth.
a)
drag
b)
lift
c)
weight
d)
thrust
5.
Pressure is measured in
a)
Pascals
b)
Newtons
c)
Meters squared
d)
Pounds per cubic meter
6.
Force divided by area is
a)
Pressure
b)
Buoyant force
c)
Hydraulic multiplication
d)
Fluid
7.
Bernoulli's principle creates ___ in airplanes
a)
Drag
b)
Lift
c)
Weight
d)
Friction
8.
The force that causes forward movement of a flying plane is called
a)
lift.
b)
thrust.
c)
weight.
d)
drag.
9.
At higher elevations, air pressure is
a)
less because there is less air above
b)
greater because there is more air below
c)
less because gravity is stronger
d)
less because the air is moving faster
10.
When pressure is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid.
a)
Pascal's principle
b)
Newton's principle
c)
Archimedes' principle
d)
Bernoulli's principle
11.
An object under water feels lighter than it does in air because of
a)
air pressure
b)
the buoyant force
c)
fluid speed
d)
temperature
12.
Bubbles rise in water because they are
a)
so tiny
b)
less dense than water
c)
more dense than water
d)
fluids
13.
The rising of smoke up a chimney is partly explained by
a)
Archimedes' principle
b)
Bernoulli's principle
c)
Pascal's principle
d)
Newton's principle
14.
A device that increases force that works because of Pascal's principle. such as the braking system of a car, is called a
a)
ABS system
b)
hydraulic system
c)
aerodynamic system
d)
operational system
15.
The density of a substance is its ____ per unit of volume
a)
weight
b)
pressure
c)
mass
d)
force
16.
The pressure exerted by the gas in Earth's atmosphere is called
a)
a barometer
b)
air pressure
c)
elevation
d)
fluid pressure
17.
Water pressure ____ as depth increases
a)
increases
b)
decreases
c)
stays the same
18.
The density of an object would be changed by changing the object's volume or its _____
a)
mass
b)
area
c)
size
d)
equation
19.
What part of the plane makes the plane roll from side to side?
a)
rudder
b)
aileron
c)
elevator
d)
rotor
20.
What force gives an upward push?
a)
lift
b)
drag
c)
thrust
d)
weight
21.
When an airplane takes flight, lift is less than the weight. True or false?
a)
True
b)
False
22.
When an airplane lands on the ground, thrust is less than the drag. True or false?
a)
True
b)
False
23.
The fact that the buoyant force on an object equals the weight of the fluid displaced is called
a)
density
b)
Archimedes principle
c)
buoyant force
d)
weight
24.
Which of the following would NOT affect the level at which a ship cruises at sea?
a)
depth of the ocean
b)
shape of the ship
c)
density of the ships material
d)
mass of the ship
25.
How does air pressure change as you go from the top of a mountain to sea level?
a)
pressure increases
b)
pressure decreases
c)
pressure stays the same
d)
it depends of the weather
26.
The touch of a foot on a brake pedal can stop tons of moving metal thanks to
a)
Pascal's principle
b)
Archimedes' principle
c)
Bernoulli's principle
d)
TVT's principal
27.
In Physical Science a fluid can be ...
a)
a gas or solid
b)
a gas or liquid
c)
gases only
d)
liquids only
28.
An object will sink in water if its average density is
a)
Equal to 1g/mL
b)
Larger than 1g/mL
c)
Less than 1g/mL
d)
Density does not matter
29.
Bernoulli's principle says that if a fluid's speed increases, its pressure will
a)
Decrease
b)
Increase
c)
Not be affected
30.
If the water a boat displaced weighs 1000 N, what is the buoyant force?
a)
1000 N
b)
9800 N
c)
1000 kg
d)
9800 kg
31.
Due to Bernoulli's principle, the pressure is ____ above an airplane's wing than below it.
a)
Lower
b)
Higher
32.
What is the goal of aerodynamics (remember watching the video with the wind tunnel and smoke)?
a)
to make vehicles slower
b)
to reduce fluid friction
c)
to increase fluid friction
d)
to make your hair look good
33.
An object is dropped into a beaker containing a liquid, The object sinks to the bottom of the beaker. Therefore, the
a)
density of the object is greater than the density of the liquid
b)
density of the object is less than the density of the liquid
c)
mass of the object is less than the mass of the liquid
d)
volume of the liquid displaced is more than the volume of the object
34.
If you blow a stream of air between two balloons that are next to each other, the balloons. This same thing happens when 2 moving boats get close to one another.
a)
rise
b)
move away from each other
c)
move toward each other
d)
move randomly
35.
What is an airfoil?
a)
a wing
b)
a helicopter rotor blade
c)
a flight promoting shape
d)
all of the above
36.
Where was it when the Wright brothers made the first flight in their plane
a)
New York City, NY
b)
Minneapolis, MN
c)
Kitty hawk, NC
d)
Glyndon, England
37.
What controls the direction of the plane from right to left (Yaw)?
a)
ailerons
b)
elevators
c)
rudder
38.
What does Bernoulli's effect explain about an airfoil?
a)
air speed causes higher pressure above the wing than below a wing
b)
air speed causes lower pressure above the wing than below a wing
39.
What part of a plane makes the plane dive and climb (pitch)?
a)
rudder
b)
ailerons
c)
elevators
40.
In Physical Science a fluid can be ...
a)
a gas or solid
b)
a gas or liquid
c)
gases only
d)
liquids only
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