WorksheetsCh 11 Forces in Fluids Test
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
What is the SI unit for pressure?
a)
Pascal (Pa)
b)
Newton (N)
c)
Kilogram (Kg)
d)
Meter (m)
2.
Pressure is
a)
force * area
b)
force / area
c)
force + area
d)
force - area
3.
At higher elevations (higher up the mountain), there is _____ air pressure.
a)
the same
b)
greater
c)
less
d)
equal
4.
As a diver moves deeper in the water, fluid pressure is
a)
the same
b)
greater
c)
less
d)
equal
5.
Objects in water feel lighter because of the
a)
air pressure
b)
buoyant force
c)
air resistance
d)
temperature
6.
An object sinks in a bucket of water. The object's density is
a)
greater than the density of sand
b)
less than the water's density
c)
the same as the water's density
d)
greater than the water's density
7.
A force on a confined fluid changes the pressure all through the fluid. This is
a)
Pascal's principle
b)
Archimedes' principle
c)
Bernoulli's principle
d)
Newton's principle
8.
A hydraulic system uses fluid to
a)
increase air pressure
b)
cause acceleration
c)
decrease air pressure
d)
multiply force
9.
As the speed of a moving fluid increases, the fluid pressure
a)
is equal
b)
decreases
c)
stays the same
d)
increases
10.
What force pushes up on an airplane wing as it moves through the air?
a)
gravity
b)
mass
c)
lift
d)
air resistance
11.
Pressure tells how much _____ is on an area
a)
air pressure
b)
force
c)
gravity
d)
mass
12.
The pressure exerted by Earth's atmosphere is
a)
air pressure
b)
force
c)
gravity
d)
mass
13.
The density of an object is its _____ divided by its volume.
a)
air pressure
b)
force
c)
gravity
d)
mass
14.
A _____ uses fluid to transmit a force.
a)
air pressure
b)
Bernoulli's principle
c)
hydraulic device
d)
mass
15.
The flow of smoke up a chimney is partly explained by
a)
Bernoulli's principle
b)
force
c)
hydraulic device
d)
gravity
16.
The device in the picture is a
a)
barometer
b)
septic tank
c)
hydraulic system
d)
buoyant force
17.
The device in the picture uses fluid to multiply force. Which principle explains why this device works?
a)
Newton's principle
b)
Pascal's principle
c)
Archimedes' principle
d)
Bernoulli's principle
18.
The ship and the steel block have the same weight. Why does the ship float while the steel block sinks?
a)
the ship displaces more water
b)
the ship displaces less water
c)
there is less gravity on the ship
d)
there is no air pressure on the ship
19.
Which principle explains why the ship floats and the steel block sinks?
a)
Newton's principle
b)
Pascal's principle
c)
Archimedes' principle
d)
Bernoulli's principle
20.
What does the buoyant force on each object in the diagram equal?
a)
the weight of the object
b)
the weight of the water displaced by the object
c)
the weight of the air pressing down on the object
d)
the gravity pulling down on the object
21.
Who exerts more pressure on the ground?
a)
a 50-kg woman standing on stilts
b)
a 50-kg woman standing on snowshoes
22.
Why aren't you crushed by the pressure of the atmosphere weighing down on you?
a)
there is equal pressure pushing up on you
b)
the pressure is greater as you go deeper
c)
the pressure is less as you go higher
d)
You are crushed. People are now extinct.
23.
What is the area of a paper that is 10-cm long and 5-cm wide?
a)
40-cm2
b)
45-cm2
c)
50-cm2
d)
2-cm2
24.
What is the formula for density?
a)
mass / volume
b)
mass * volume
c)
mass + volume
d)
mass - volume
25.
What is the formula for pressure?
a)
mass / volume
b)
length * width
c)
force / area
d)
mass * width
100 %
