Physics for IGCSE & O level - Forces And Pressure (Section 4)
1
What is the relationship between pressure and area (at a constant force)?
2
Which materials are described as plastic?
3
What can make an object more stable?
4
If the force applied to an object is reduced while the area remains constant, what happens to the pressure?
5
Where is the center of gravity on a symmetrical object located?
پاسخ دهید(C)
At the geometric center of the object.
6
How does increasing the area over which a force acts affect pressure?
7
What happens to pressure inside a container of gas if you increase the number of gas molecules?
8
What is the pressure exerted by the air on the surface of the Earth?
9
What does the term "plastic deformation" refer to?
پاسخ دهید(B)
Permanent change in shape
10
What are the consequences of exceeding a material's elastic limit?
11
What are the primary factors that affect the pressure in a gas?
12
What is the relationship between force and pressure?
13
In the context of springs, what is the 'extension'?
پاسخ دهید(B)
The change in length of the spring when a force is applied.
14
How is the stability of an object affected by its center of gravity?
15
What is the formula that relates spring constant (k), force (F), and extension (x)?
16
What does a moment quantify?
پاسخ دهید(B)
The turning effect of a force.
17
What unit is often used to describe the density of a liquid or gas?
18
If a spring's extension doubles when a force is applied, what is the relationship between the force and the spring's extension?
19
What does the term 'elasticity' refer to in materials science?
پاسخ دهید(C)
The ability of a material to return to its original shape after deformation.
20
If two objects exert the same force but have different areas of contact, which object will exert greater pressure?
پاسخ دهید(B)
The object with the smaller area
21
How is pressure related to the collisions of gas molecules?
پاسخ دهید(A)
Pressure is caused by collisions
22
How does force influence pressure?
23
When a balloon rises in the atmosphere, what happens to its volume?
24
What is the meaning of the 'elastic limit' of a material?
پاسخ دهید(B)
The point beyond which the material will not return to its original shape.
25
What quantities are required to test the principle of moments?
26
In a state of equilibrium, what is the net force acting on an object?
27
What does a manometer measure?
28
What describes the behavior of a material when the force applied exceeds its elastic limit?
پاسخ دهید(B)
The material is permanently deformed.
29
Which is an example of a plastic material?
30
What is the net force on an object in equilibrium?
31
Which factor is crucial in determining the turning effect of a force?
پاسخ دهید(D)
Both the force and the distance from the pivot point.
32
What is a synonym for standard atmospheric pressure?
33
In the context of liquids, which way(s) does pressure act?
34
In Hooke's Law, what is the relationship between the force applied to a spring and its extension?
پاسخ دهید(B)
They are directly proportional within the elastic limit.
35
Which factors affect the stability of an object?
36
In a closed system, what will happen to the force applied to an incompressible fluid?
پاسخ دهید(B)
The force is transmitted equally
37
What is the unit for measuring force in the SI system?
38
What is the term for materials that can be easily stretched but return to their original form?
39
What does Hooke's Law state regarding springs?
پاسخ دهید(B)
Force is directly proportional to extension within the elastic limit.
40
When a diver goes deeper in the ocean, what will change?
41
Which of the following describes the units for pressure?
42
If force is doubled, what happens to the pressure (assuming the area remains constant)?
43
Which law is most directly related to the behavior of gases?
44
If you double the force while halving the area, what happens to the pressure?
45
In general, what will happen to the pressure inside a container if more gas is added (assuming the volume is fixed)?
46
What is the unit of measurement for area?
47
What does pressure primarily measure in the context of a gas?
پاسخ دهید(C)
The collisions of gas molecules
48
What is Boyle's Law primarily concerned with?
49
What happens to a balloon if the air pressure outside it decreases?
50
What does the area represent when calculating pressure?
پاسخ دهید(A)
The surface the force is applied to
