Physics for IGCSE & O level - Forces And Motion (Section 4)
1
Which of the following correctly describes free fall?
2
What does the spring balance measure?
3
What happens to the acceleration of an object if the net force on it is doubled?
4
What happens to the acceleration of an object if the mass is kept constant and the force is increased?
5
What does Newton's third law state?
Отвечать(A)
For every action, there is an equal and opposite reaction.
6
What is Newton's second law of motion?
7
What will a curved line on a speed-time graph indicate?
8
What is the reason for movement?
9
In the context of Newton's third law of motion, if object A exerts a force on object B, then:
Отвечать(A)
Object B will exert an equal and opposite force on object A.
10
What does the slope of a velocity-time graph represent?
11
Which of the following best describes the relationship between force and momentum?
Отвечать(A)
Force causes a change in momentum.
12
Which of these parameters affect the speed of a car?
13
What is the unit of measurement for speed in the example?
14
If the net force acting on an object is zero, the object will:
Отвечать(C)
Maintain constant velocity.
15
Which factors influence the amount of centripetal force on the satellite?
16
If the centripetal force is removed, which action would it produce?
Отвечать(D)
The object would move in a straight line.
17
What enables a rocket to move through space?
Отвечать(D)
The expulsion of hot gases
18
What type of quantity is acceleration?
19
How do you add vectors graphically?
20
Which law of motion explains why a rocket can move in space?
21
Which one of the following is a vector?
22
If the momentum of an object changes, what has occurred?
23
How can you identify whether an object is accelerating on a speed-time graph?
24
Which is the force that causes the tires of a car to move it forward?
25
What happens when an object moves at a constant speed in a circle?
Отвечать(C)
Its direction is constantly changing.
26
Which law of motion states that for every action, there is an equal and opposite reaction?
27
What is the unit of acceleration?
28
What does the term 'resultant force' mean?
Отвечать(C)
A single force that represents the effect of all forces acting on an object.
29
In a rocket engine, what provides the thrust?
30
What type of friction is shown when the wheel starts rolling?
31
What happens if the radius of the circle is increased while moving in a circle?
Отвечать(A)
The centripetal force will decrease.
32
What is the definition of velocity?
Отвечать(C)
Speed in a specific direction.
33
What is a vector quantity?
34
What does acceleration measure?
Отвечать(C)
How the speed of an object changes over time
35
What is the definition of velocity?
Отвечать(B)
The speed of an object in a particular direction.
36
If an object is moving at a constant speed in a circle, what is happening to its velocity?
37
Which quantities are represented by the slope and area of a velocity-time graph?
38
Which is the appropriate description of velocity?
39
How is a vector represented?
40
What are the components of a vector?
41
What is the best description of the term 'free fall'?
Отвечать(B)
Falling with only gravity acting upon the object.
42
Which of the following statements are true regarding a falling object?
43
What is the formula for calculating the acceleration of free fall?
44
What is the average speed of a car that travels 100 meters in 10 seconds?
45
What type of force does a satellite use to orbit around Earth?
46
What is the standard unit for measuring force?
47
According to Newton's second law of motion, what is the relationship between force, mass, and acceleration?
Отвечать(B)
Force = mass x acceleration
48
What are the two components that cause the force in a helicopter?
49
What does a curved line on a speed-time graph indicate?
50
Which scenario illustrates Newton's first law?
Отвечать(C)
A ball at rest stays at rest.
