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Physics for IGCSE & O level - Forces And Motion (Section 4)

1
Which of the following correctly describes free fall?
Answer
A
B
2
What does the spring balance measure?
Answer
(B)
Weight
3
What happens to the acceleration of an object if the net force on it is doubled?
Answer
(B)
It doubles.
4
What happens to the acceleration of an object if the mass is kept constant and the force is increased?
Answer
(B)
It increases.
5
What does Newton's third law state?
Answer
(A)
For every action, there is an equal and opposite reaction.
6
What is Newton's second law of motion?
Answer
(A)
F = ma
7
What will a curved line on a speed-time graph indicate?
Answer
A
C
8
What is the reason for movement?
Answer
(D)
Fuel combustion
9
In the context of Newton's third law of motion, if object A exerts a force on object B, then:
Answer
(A)
Object B will exert an equal and opposite force on object A.
10
What does the slope of a velocity-time graph represent?
Answer
(B)
Acceleration
11
Which of the following best describes the relationship between force and momentum?
Answer
(A)
Force causes a change in momentum.
12
Which of these parameters affect the speed of a car?
Answer
A
B
C
13
What is the unit of measurement for speed in the example?
Answer
(A)
meters per second
14
If the net force acting on an object is zero, the object will:
Answer
(C)
Maintain constant velocity.
15
Which factors influence the amount of centripetal force on the satellite?
Answer
A
B
C
16
If the centripetal force is removed, which action would it produce?
Answer
(D)
The object would move in a straight line.
17
What enables a rocket to move through space?
Answer
(D)
The expulsion of hot gases
18
What type of quantity is acceleration?
Answer
(B)
Vector
19
How do you add vectors graphically?
Answer
(B)
Draw them head-to-tail.
20
Which law of motion explains why a rocket can move in space?
Answer
(C)
Newton's Third Law.
21
Which one of the following is a vector?
Answer
(C)
Force
22
If the momentum of an object changes, what has occurred?
Answer
(C)
An impulse was applied.
23
How can you identify whether an object is accelerating on a speed-time graph?
Answer
(D)
All of the above
24
Which is the force that causes the tires of a car to move it forward?
Answer
(B)
Frictional force.
25
What happens when an object moves at a constant speed in a circle?
Answer
(C)
Its direction is constantly changing.
26
Which law of motion states that for every action, there is an equal and opposite reaction?
Answer
(C)
Third Law
27
What is the unit of acceleration?
Answer
(C)
m/s^2
28
What does the term 'resultant force' mean?
Answer
(C)
A single force that represents the effect of all forces acting on an object.
29
In a rocket engine, what provides the thrust?
Answer
(A)
Hot exhaust gases.
30
What type of friction is shown when the wheel starts rolling?
Answer
(D)
Rolling friction
31
What happens if the radius of the circle is increased while moving in a circle?
Answer
(A)
The centripetal force will decrease.
32
What is the definition of velocity?
Answer
(C)
Speed in a specific direction.
33
What is a vector quantity?
Answer
(C)
Force
34
What does acceleration measure?
Answer
(C)
How the speed of an object changes over time
35
What is the definition of velocity?
Answer
(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?
Answer
(D)
It is changing.
37
Which quantities are represented by the slope and area of a velocity-time graph?
Answer
A
B
38
Which is the appropriate description of velocity?
Answer
(A)
Speed with direction.
39
How is a vector represented?
Answer
A
B
C
40
What are the components of a vector?
Answer
A
B
41
What is the best description of the term 'free fall'?
Answer
(B)
Falling with only gravity acting upon the object.
42
Which of the following statements are true regarding a falling object?
Answer
A
C
D
43
What is the formula for calculating the acceleration of free fall?
Answer
(C)
g = 9.8 m/s²
44
What is the average speed of a car that travels 100 meters in 10 seconds?
Answer
(B)
10 m/s
45
What type of force does a satellite use to orbit around Earth?
Answer
(A)
Gravitational
46
What is the standard unit for measuring force?
Answer
(C)
N
47
According to Newton's second law of motion, what is the relationship between force, mass, and acceleration?
Answer
(B)
Force = mass x acceleration
48
What are the two components that cause the force in a helicopter?
Answer
A
B
49
What does a curved line on a speed-time graph indicate?
Answer
(B)
Changing acceleration
50
Which scenario illustrates Newton's first law?
Answer
(C)
A ball at rest stays at rest.