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Physics for IGCSE & O level - Forces And Pressure (Section 3)

1
Which factors must be considered when calculating the moment of a force?
Answer
A
B
2
What is the approximate value of atmospheric pressure at sea level?
Answer
(A)
101300 Pa
3
Which of the following is the unit for density?
Answer
(D)
Kilogram per cubic meter
4
What can be used to determine the depth in a liquid?
Answer
(D)
Pressure Gauge
5
What type of relationship describes pressure and volume at a constant temperature?
Answer
(B)
Inversely proportional
6
If the same force is applied to a larger area, what happens to pressure?
Answer
(B)
Decreases
7
What happens to the pressure inside a balloon when it's released?
Answer
(B)
Decreases
8
What does the moment of a force equal to?
Answer
(C)
force x perpendicular distance from the point
9
What is the unit used to measure the moment of a force?
Answer
(C)
Newton-meter (Nm)
10
What is the formula for pressure?
Answer
(B)
Force / Area
11
Which is the correct unit for measuring the moment of a force?
Answer
(D)
Newton-meter (Nm)
12
Which factors contribute to making an object stable?
Answer
A
B
13
What does 'extension' mean in the context of a spring?
Answer
(C)
The change in length of the spring when a force is applied.
14
What is the characteristic of a material undergoing plastic deformation?
Answer
(C)
It is permanently deformed.
15
What is the height of a mercury column for 1 atmosphere (approximately)?
Answer
(A)
760 mm
16
What does the barometer primarily measure?
Answer
(C)
Atmospheric pressure
17
In equilibrium, what is the relationship between clockwise and anticlockwise moments?
Answer
(C)
Clockwise and anticlockwise moments are equal.
18
What is the definition of the elastic limit?
Answer
A
B
C
19
What happens to the value of the spring constant (k) if a stiffer spring is used?
Answer
(B)
The spring constant increases.
20
What are the two main requirements for an object to be in static equilibrium?
Answer
A
B
21
What is Boyle's Law primarily about?
Answer
(A)
Pressure and Volume
22
What would happen to the pressure on a submerged object if it was moved deeper?
Answer
(B)
Pressure increases
23
Which of these affects pressure in the air?
Answer
A
B
D
24
What happens to the pressure of a gas if you increase the number of gas molecules within a fixed volume?
Answer
(A)
Increases
25
What is a common unit of pressure?
Answer
(A)
Pascal (Pa)
26
Which of the following factors influences pressure in liquids?
Answer
A
B
27
What is the unit for area in the metric system?
Answer
(C)
Square meter
28
What quantity is calculated by dividing force by area?
Answer
(B)
Pressure
29
What is the main factor in determining the pressure exerted by an object on a surface?
Answer
(A)
The weight of the object.
30
Which of the following is an example of plastic deformation?
Answer
(B)
Bending a piece of clay
31
How does temperature affect the pressure of a gas at constant volume?
Answer
(A)
Increases pressure
32
Which of the following is a unit for force?
Answer
(B)
Newton
33
What is another name for the turning effect of a force?
Answer
(C)
Torque
34
What are standard conditions for atmospheric pressure?
Answer
(B)
101.3 kPa
35
Which situations demonstrate a stable equilibrium?
Answer
A
B
C
36
What happens to the volume of a gas when pressure is increased (temperature constant)?
Answer
(B)
Decreases
37
What does the term 'Hooke's Law' relate to?
Answer
(A)
Spring constant
38
What is calculated by the formula: Force / Area?
Answer
(B)
Pressure
39
Which of the following materials would likely exhibit plastic deformation?
Answer
(C)
Clay
40
What units would you use to calculate the volume of the liquid?
Answer
(D)
m³
41
What is the relationship between the force applied and the pressure exerted, assuming the area is constant?
Answer
(A)
Directly proportional
42
What type of instrument measures atmospheric pressure?
Answer
(A)
Barometer
43
What are the units commonly used for measuring pressure?
Answer
A
C
44
If the area of the surface increases while the force remains constant, what happens to the pressure?
Answer
(B)
Decreases
45
Which statement describes the characteristics of an object in unstable equilibrium?
Answer
(C)
It falls over after being displaced.
46
In the context of pressure, what does 'force' refer to?
Answer
(C)
A push or pull
47
Which scenarios demonstrate the principle of moments?
Answer
A
B
48
How does pressure affect the boiling point of water?
Answer
(A)
Increases it
49
What is the unit of force?
Answer
(A)
Newtons (N)
50
What happens to a spring's behavior beyond the limit of proportionality?
Answer
A
C
D