Physics for IGCSE & O level - Forces And Pressure (Section 2)
1
If temperature remains constant, what relationship exists between pressure and volume?
2
Which of the following statements is true regarding pressure in a liquid?
3
In a stable state of equilibrium, what happens if the object is displaced?
Απάντηση(C)
The object returns to its original position.
4
What are examples of things that have a center of gravity?
5
Which of the following affects the pressure in a liquid?
6
If the volume of gas is halved, what happens to the pressure (assuming constant temperature)?
7
Which term defines a material that returns to its original shape after the removal of an applied force?
8
What formula is used to determine pressure?
9
Which of the following are directly related?
10
When is Hooke's Law applicable?
Απάντηση(C)
Within the elastic limit of a material.
11
Which of the following is a key characteristic of air pressure?
12
What happens to pressure if the force remains constant, and the area increases?
13
What is the unit of the turning effect of a force (moment)?
14
What is the formula for calculating pressure?
15
What is the pressure inside a bubble at a certain depth?
16
What is the unit of measurement for pressure?
17
What are some factors determining the pressure in a liquid?
18
In a state of equilibrium, what happens to the bar?
19
Which of these is the primary cause of gas pressure?
Απάντηση(C)
The movement of the gas molecules
20
What effect does increasing the surface area of contact have on the pressure, assuming a constant force?
21
What aspects of an object are most important to its stability?
22
What happens if a force is applied beyond the limit of proportionality in a spring?
Απάντηση(B)
The spring's extension is no longer proportional to the force.
23
What is the height of a column of mercury at standard atmospheric pressure?
24
What is the SI unit for force?
25
How does increasing the surface area affect the pressure exerted by a force?
26
In the equation Pressure = Force / Area, what does the area represent?
Απάντηση(B)
The surface upon which the force acts
27
Απάντηση(A)
A force that is causing rotation
28
If a shape is hanging from a string, and the center of gravity is directly below the point of suspension, what kind of equilibrium is it?
29
What does Hooke's Law describe?
Απάντηση(B)
The relationship between force and extension in a spring.
30
What is the definition of the centre of gravity?
Απάντηση(A)
The point where the weight of the object is concentrated.
31
How is the pressure related to temperature?
32
What is one way to measure pressure?
33
What is the pressure exerted by a gas due to?
Απάντηση(C)
Collisions of gas molecules with the container walls
34
What does increasing the force on a surface do to pressure?
35
In the formula Pressure = Force / Area, which quantities need to be known to calculate pressure?
36
What happens to gas pressure when the temperature of the gas increases (volume constant)?
37
How does air pressure change as you rise in the atmosphere?
38
What factors influence the amount of pressure exerted by an object?
39
What conditions are required for an object to be in static equilibrium?
40
What concepts are related to the understanding of Hooke's Law?
41
What is a common example of using pressure in everyday life?
42
Which factor affects how difficult it is to crush a can?
Απάντηση(B)
The air pressure outside the can
43
What happens to the atmospheric pressure at higher altitudes?
44
What can be said about the net force on an object that is in equilibrium?
45
What is extension in relation to springs?
Απάντηση(C)
The change in length when force is applied.
46
What will increasing the spring constant of a spring do?
Απάντηση(B)
Make the spring harder to stretch.
47
How does altitude affect atmospheric pressure?
Απάντηση(B)
Higher altitude, lower pressure
48
Which of these materials would stretch elastically?
49
If the area over which a force is applied is reduced, what happens to the pressure (assuming the force stays the same)?
50
If a material experiences permanent deformation after a force is applied, what kind of behavior is exhibited?
