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Physics for IGCSE & O level - Forces And Pressure (Section 6)

1
Which of these describes Boyle's Law?
Answer
(A)
P1V1 = P2V2
2
What can be inferred from the statement "the extension is proportional to the load"?
Answer
(C)
The spring is behaving elastically.
3
If the amount of gas increases in a sealed container, what happens to the pressure?
Answer
(B)
Pressure increases
4
What does the principle of moments state?
Answer
(A)
The sum of the clockwise moments about a point equals the sum of the anticlockwise moments.
5
What does the pressure in a liquid depend on?
Answer
A
B
6
What is the unit of measurement for the spring constant?
Answer
(D)
Newtons per meter (N/m)
7
Which gas law is most directly related to the relationship between pressure and volume?
Answer
(B)
Boyle's Law
8
What is the effect on pressure when the contact area is increased, assuming force stays constant?
Answer
(B)
The pressure decreases.
9
Which of these is NOT a factor determining the pressure of a gas?
Answer
(D)
Shape of container
10
What happens to the density of a gas when it is compressed?
Answer
(A)
Increases
11
When a spring is stretched, what is the relationship between the force and its extension?
Answer
(B)
They are directly proportional within the elastic limit.
12
What conditions must be met for an object to be in static equilibrium?
Answer
A
B
13
If you have a fixed amount of gas and decrease the container's volume, what happens to the gas pressure (assuming constant temperature)?
Answer
(A)
Increases
14
What happens to the spring constant (k) if you use a stiffer spring?
Answer
(B)
It increases
15
Which best describes a material's behavior when it is 'plastic'?
Answer
(B)
It deforms permanently.
16
Which is an example of an elastic material?
Answer
(B)
Steel
17
What will happen to a spring stretched beyond its elastic limit?
Answer
(C)
It experiences permanent deformation.
18
Which are the conditions for equilibrium?
Answer
A
B
C
19
What is the relationship between force and extension in Hooke's law?
Answer
(B)
The force and extension are only proportional within the elastic limit.
20
What type of equilibrium is exhibited by a ball on a flat surface?
Answer
(C)
Neutral
21
The air pressure is roughly equivalent to how many kPa (kilopascals)?
Answer
(B)
101.3 kPa
22
What is the relationship between the pressure and the depth of a liquid?
Answer
(B)
Directly proportional
23
Which principle relates to the pressure applied to a confined fluid?
Answer
(A)
Pascal's Principle
24
What happens to the pressure exerted by a liquid if its depth increases?
Answer
(B)
Pressure increases
25
Which concept is discussed under 'pressure'?
Answer
A
C
26
What are the properties of an elastic material?
Answer
(B)
Returns to original shape
27
If the surface area is decreased and the force remains constant, how does the pressure change?
Answer
(B)
Pressure increases
28
In the context of gases, what does Boyle's Law relate?
Answer
(B)
Pressure and volume
29
What unit of measurement is used to measure force?
Answer
(B)
Newton
30
How does Boyle's Law relate pressure and volume?
Answer
(B)
Inversely
31
What is the name of the instrument used to measure atmospheric pressure?
Answer
(A)
A barometer
32
If the force acting on an object is doubled, while the area over which the force is applied is also doubled, what happens to the pressure?
Answer
(C)
Pressure remains the same.
33
Which of the following could cause a change in gas pressure?
Answer
A
B
C
34
A bubble rises to the surface of water. What happens to the pressure on the bubble?
Answer
(B)
Pressure decreases
35
What is a key topic presented at the start of the section?
Answer
(A)
Gas pressure and volume
36
In the context of the text, what is meant by the word 'elastic'?
Answer
(B)
Stretchy and returning to original form
37
What happens to the pressure when the volume of a gas is reduced (assuming a constant temperature)?
Answer
(B)
Pressure increases.
38
What is the approximate atmospheric pressure at sea level?
Answer
(B)
101300 Pa
39
Which law describes the relationship between pressure and volume in a gas at constant temperature?
Answer
(B)
Boyle's Law
40
What is needed to calculate pressure?
Answer
A
B
41
What does the text mention as one of the items covered in this section?
Answer
(D)
All of the above
42
What does 'g' represent in the liquid pressure formula (Pressure = Density * g * Height)?
Answer
(B)
Gravity
43
Which of the following can be used to measure pressure?
Answer
A
C
44
Which of these increases the pressure exerted by a liquid at a specific point?
Answer
A
B
45
Which of the following is NOT a factor that affects the pressure exerted on the ground by a person?
Answer
(D)
The person's height
46
The pressure of a gas is created by?
Answer
(B)
The collisions of gas molecules with the walls.
47
What materials are elastic?
Answer
A
C
48
If the force is constant, what happens to the pressure if the area decreases?
Answer
(B)
Pressure increases
49
What is mentioned about pressure?
Answer
A
B
50
If you double the area and keep the force the same, what happens to the pressure?
Answer
(B)
The pressure halves.