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?
Απάντηση(C)
The material will experience permanent deformation.
2
Which of these is another way of saying Boyle's Law?
3
What does Hooke's Law state about the relationship between force and extension in a spring?
Απάντηση(C)
Directly proportional within the elastic limit
4
What happens to a material when a force is applied to it beyond its elastic limit?
Απάντηση(C)
It experiences permanent deformation.
5
What is a device that is used to measure the altitude above sea level?
6
What is the relationship between pressure and depth in a liquid?
7
What quantity does the spring constant (k) represent?
8
What is the unit of pressure in the metric system?
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?
Απάντηση(C)
Pressure is the same in both containers.
10
What is the name given to the turning effect of a force?
11
How is the pressure in a liquid measured?
12
What are the essential things for a spring to be stretched?
13
What is the relationship between the area and the pressure, assuming the force is constant?
14
What happens when a diver goes deeper into the water?
15
How to make the pressure increase?
16
What are the two necessary conditions for an object to be in equilibrium?
17
What does the term "center of gravity" represent?
Απάντηση(B)
The point where the weight of an object appears to act.
18
What are examples of forces?
19
How is the force determined if pressure and area are known?
20
If the force applied to an object increases while the area remains constant, how does the pressure change?
21
What does the turning effect of a force about a pivot point depend on?
Απάντηση(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?
23
How is the spring constant (k) calculated?
24
What is the force exerted by air on a surface called?
25
Which of the following is a key characteristic of atmospheric pressure?
26
What is the unit for force?
27
What does Hooke's Law describe about a spring?
Απάντηση(B)
The relationship between force and extension.
28
What will happen to a spring if the applied force exceeds its elastic limit?
Απάντηση(C)
It will experience permanent deformation.
29
In the context of springs, what is the meaning of 'extension'?
Απάντηση(C)
The amount the spring stretches under a load.
30
How can pressure be increased?
Απάντηση(C)
By increasing the force and decreasing the area.
31
What is the key factor in increasing the pressure in liquids?
32
What is the relationship between pressure and altitude?
Απάντηση(B)
As altitude increases, pressure decreases
33
How does the pressure exerted by a liquid change with its density?
34
If you double the depth of a liquid, what happens to the pressure?
35
What kind of equilibrium does a cone in its original upright position represent?
36
How is pressure calculated?
37
What is the term for the change in length of a spring when a force is applied?
38
As you go deeper into a liquid, what will increase?
39
Which principle explains why objects float?
40
What characteristics relate to a stable object?
41
How does increasing the depth affect the pressure in a liquid?
42
What characterizes a material in the 'elastic' region?
Απάντηση(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?
Απάντηση(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?
45
How is pressure related to the concentration of gas molecules in a certain volume?
46
What will happen to the boiling point of water if the pressure increases?
48
What are the key variables in the study of gas behavior?
49
If force is reduced by half and the area is doubled, what is the effect on pressure?
50
Which factors can affect pressure exerted on a surface?
