Physics for IGCSE & O level - Forces And Pressure (Section 1)
1
What is the term given to the turning effect of a force?
2
If an object is suspended and the plumb line position is marked by the line AB, where is the center of gravity located?
3
What is the term for a material that returns to its original shape after a force is removed?
4
What is the formula used to calculate pressure?
5
In a spring, what is the limit of proportionality?
คำตอบ(A)
The point beyond which the spring is permanently stretched.
6
At a constant temperature, how does the pressure and volume of a gas relate?
7
What is the unit of measurement for the spring constant (k)?
8
What is the relationship between the sum of clockwise moments and the sum of anticlockwise moments when an object is in equilibrium?
9
What defines the 'elastic limit' of a material?
10
What is the unit used to measure the spring constant?
11
What do you call the force acting over a certain area?
12
What happens to a spring if the force applied exceeds its elastic limit?
คำตอบ(C)
It is permanently stretched.
13
Which phrase best defines the term 'moment' in physics?
คำตอบ(B)
The turning effect of a force.
14
If the same force is applied over a smaller area, how does the pressure change?
15
What is the effect of a force on an object when it is in equilibrium?
คำตอบ(B)
The net force acting on the object is zero.
16
What does the spring constant (k) represent in Hooke's Law?
คำตอบ(C)
The stiffness of the spring.
17
What happens to the pressure of a gas when the volume is decreased while keeping the temperature constant?
18
How do you calculate the pressure exerted by a force?
19
What defines a material that is 'elastic'?
คำตอบ(C)
It returns to its original shape after deformation.
20
If the force increases and the area stays the same, what happens to the pressure?
21
What are the correct units for moment?
22
What describes the relationship between force applied to a spring and its extension, within its elastic limit?
คำตอบ(C)
The force is proportional to the extension.
23
In an ideal gas, how does the collision of molecules impact pressure?
24
Which of the following is the best way to increase pressure?
คำตอบ(D)
Decreasing the area and increasing the force.
25
What factors affect pressure in a liquid?
26
What is the net force on an object at rest, in terms of equilibrium?
27
According to Boyle's law, if the volume of a gas decreases, what happens to the pressure (at constant temperature)?
28
Which is a characteristic of plastic deformation?
คำตอบ(C)
The material undergoes a permanent change in shape.
29
Which of these can compress?
30
What happens to a gas's pressure when the volume it occupies is increased?
31
If a spring is stretched beyond its elastic limit, what is most likely to happen?
คำตอบ(D)
The spring is permanently deformed.
32
What effect does increasing the area over which a force acts have on pressure?
คำตอบ(B)
It decreases the pressure.
33
What happens when the same force is applied over a larger area?
34
In which direction(s) does pressure act on a surface?
35
What is the unit for measuring pressure?
36
What happens to the boiling point of a liquid when it is moved to a higher altitude?
37
What happens to a cone in stable equilibrium?
คำตอบ(B)
The cone returns to its original position.
38
Which is the correct formula for calculating pressure?
39
What is the formula for pressure?
40
Which of the following is the correct formula for calculating the spring constant?
41
Which of the following is the unit for the force?
42
If the force is constant and the area doubles, what happens to the pressure?
43
If the temperature of a gas increases, what typically happens to its pressure (assuming constant volume)?
44
What characterizes a material that is elastic?
คำตอบ(C)
Returns to original shape
45
If you decrease the volume of a gas, what happens to the collisions?
46
What is needed to test the principle of moments?
47
Which term describes the change in a spring's length when a force is applied?
48
What does it mean if the pressure is 101.3 kPa?
คำตอบ(B)
The pressure is the same as atmospheric pressure
49
Which of the following statements are true regarding pressure in a liquid?
50
What is the state of equilibrium of a ball resting at the bottom of a bowl?
