Physics for IGCSE & O level - Forces And Pressure (Section 6)
1
Which of these describes Boyle's Law?
2
What can be inferred from the statement "the extension is proportional to the load"?
Antwort(C)
The spring is behaving elastically.
3
If the amount of gas increases in a sealed container, what happens to the pressure?
4
What does the principle of moments state?
Antwort(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?
6
What is the unit of measurement for the spring constant?
7
Which gas law is most directly related to the relationship between pressure and volume?
8
What is the effect on pressure when the contact area is increased, assuming force stays constant?
9
Which of these is NOT a factor determining the pressure of a gas?
10
What happens to the density of a gas when it is compressed?
11
When a spring is stretched, what is the relationship between the force and its extension?
Antwort(B)
They are directly proportional within the elastic limit.
12
What conditions must be met for an object to be in static equilibrium?
13
If you have a fixed amount of gas and decrease the container's volume, what happens to the gas pressure (assuming constant temperature)?
14
What happens to the spring constant (k) if you use a stiffer spring?
15
Which best describes a material's behavior when it is 'plastic'?
16
Which is an example of an elastic material?
17
What will happen to a spring stretched beyond its elastic limit?
Antwort(C)
It experiences permanent deformation.
18
Which are the conditions for equilibrium?
19
What is the relationship between force and extension in Hooke's law?
Antwort(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?
21
The air pressure is roughly equivalent to how many kPa (kilopascals)?
22
What is the relationship between the pressure and the depth of a liquid?
23
Which principle relates to the pressure applied to a confined fluid?
24
What happens to the pressure exerted by a liquid if its depth increases?
25
Which concept is discussed under 'pressure'?
26
What are the properties of an elastic material?
Antwort(B)
Returns to original shape
27
If the surface area is decreased and the force remains constant, how does the pressure change?
28
In the context of gases, what does Boyle's Law relate?
29
What unit of measurement is used to measure force?
30
How does Boyle's Law relate pressure and volume?
31
What is the name of the instrument used to measure atmospheric pressure?
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?
Antwort(C)
Pressure remains the same.
33
Which of the following could cause a change in gas pressure?
34
A bubble rises to the surface of water. What happens to the pressure on the bubble?
35
What is a key topic presented at the start of the section?
36
In the context of the text, what is meant by the word 'elastic'?
Antwort(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)?
38
What is the approximate atmospheric pressure at sea level?
39
Which law describes the relationship between pressure and volume in a gas at constant temperature?
40
What is needed to calculate pressure?
41
What does the text mention as one of the items covered in this section?
42
What does 'g' represent in the liquid pressure formula (Pressure = Density * g * Height)?
43
Which of the following can be used to measure pressure?
44
Which of these increases the pressure exerted by a liquid at a specific point?
45
Which of the following is NOT a factor that affects the pressure exerted on the ground by a person?
46
The pressure of a gas is created by?
Antwort(B)
The collisions of gas molecules with the walls.
47
What materials are elastic?
48
If the force is constant, what happens to the pressure if the area decreases?
49
What is mentioned about pressure?
50
If you double the area and keep the force the same, what happens to the pressure?
