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Physics for IGCSE & O level - Forces And Pressure (Section 5)

1
What will happen if a force is applied to a material beyond its elastic limit?
Answer
(C)
The material will experience permanent deformation.
2
Which of these is another way of saying Boyle's Law?
Answer
(C)
P1V1 = P2V2
3
What does Hooke's Law state about the relationship between force and extension in a spring?
Answer
(C)
Directly proportional within the elastic limit
4
What happens to a material when a force is applied to it beyond its elastic limit?
Answer
(C)
It experiences permanent deformation.
5
What is a device that is used to measure the altitude above sea level?
Answer
(C)
Altimeter
6
What is the relationship between pressure and depth in a liquid?
Answer
(A)
Directly proportional
7
What quantity does the spring constant (k) represent?
Answer
(B)
The spring's stiffness.
8
What is the unit of pressure in the metric system?
Answer
(A)
Pascal (Pa)
9
If two containers hold water and one is wider and the other is narrower, at the same depth, what is the difference in pressure at the bottom?
Answer
(C)
Pressure is the same in both containers.
10
What is the name given to the turning effect of a force?
Answer
(C)
Moment
11
How is the pressure in a liquid measured?
Answer
(C)
Pressure gauge
12
What are the essential things for a spring to be stretched?
Answer
A
C
13
What is the relationship between the area and the pressure, assuming the force is constant?
Answer
(B)
Inversely proportional
14
What happens when a diver goes deeper into the water?
Answer
(B)
Pressure increases
15
How to make the pressure increase?
Answer
A
D
16
What are the two necessary conditions for an object to be in equilibrium?
Answer
A
B
17
What does the term "center of gravity" represent?
Answer
(B)
The point where the weight of an object appears to act.
18
What are examples of forces?
Answer
A
B
C
19
How is the force determined if pressure and area are known?
Answer
(A)
Force = Pressure * Area
20
If the force applied to an object increases while the area remains constant, how does the pressure change?
Answer
(C)
Pressure increases.
21
What does the turning effect of a force about a pivot point depend on?
Answer
(C)
Both the force and the distance from the pivot.
22
If you increase the force applied over a specific area, what happens to the pressure?
Answer
(A)
Increases
23
How is the spring constant (k) calculated?
Answer
(B)
k = Force / Extension
24
What is the force exerted by air on a surface called?
Answer
(B)
Atmospheric pressure
25
Which of the following is a key characteristic of atmospheric pressure?
Answer
(B)
Variable
26
What is the unit for force?
Answer
(B)
Newton (N)
27
What does Hooke's Law describe about a spring?
Answer
(B)
The relationship between force and extension.
28
What will happen to a spring if the applied force exceeds its elastic limit?
Answer
(C)
It will experience permanent deformation.
29
In the context of springs, what is the meaning of 'extension'?
Answer
(C)
The amount the spring stretches under a load.
30
How can pressure be increased?
Answer
(C)
By increasing the force and decreasing the area.
31
What is the key factor in increasing the pressure in liquids?
Answer
(B)
Increasing depth
32
What is the relationship between pressure and altitude?
Answer
(B)
As altitude increases, pressure decreases
33
How does the pressure exerted by a liquid change with its density?
Answer
(A)
Directly proportional
34
If you double the depth of a liquid, what happens to the pressure?
Answer
(A)
Doubles
35
What kind of equilibrium does a cone in its original upright position represent?
Answer
(A)
Stable equilibrium
36
How is pressure calculated?
Answer
(B)
Force / Area
37
What is the term for the change in length of a spring when a force is applied?
Answer
(C)
Extension
38
As you go deeper into a liquid, what will increase?
Answer
(B)
Pressure
39
Which principle explains why objects float?
Answer
(B)
Archimedes' Principle
40
What characteristics relate to a stable object?
Answer
A
B
41
How does increasing the depth affect the pressure in a liquid?
Answer
(A)
Increases it
42
What characterizes a material in the 'elastic' region?
Answer
(C)
The material returns to its original shape after the force is removed.
43
When a material is described as 'elastic', what does this mean?
Answer
(B)
It returns to its original shape after the force is removed.
44
Which of the following will increase the pressure of a gas in a closed container?
Answer
A
B
D
45
How is pressure related to the concentration of gas molecules in a certain volume?
Answer
(A)
Directly proportional
46
What will happen to the boiling point of water if the pressure increases?
Answer
(A)
Boiling point increases
47
What is a moment?
Answer
A
B
48
What are the key variables in the study of gas behavior?
Answer
A
B
C
49
If force is reduced by half and the area is doubled, what is the effect on pressure?
Answer
(C)
Pressure is quartered
50
Which factors can affect pressure exerted on a surface?
Answer
A
B