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Physics for IGCSE & O level - Forces And Motion (Section 5)

1
Which of the following is a scalar quantity?
Answer
(C)
Time
2
What type of quantity is velocity?
Answer
(B)
Vector quantity
3
What happens to the speed of a ball after it is thrown horizontally?
Answer
(C)
Remains constant (ignoring air resistance)
4
If the mass of an object is 2 kg and its velocity is 5 m/s, what is its momentum?
Answer
(D)
10 kg m/s
5
If an object is slowing down, what is the sign of its acceleration?
Answer
(B)
Negative
6
What physical quantity is represented by the product of force and time?
Answer
(B)
Impulse
7
What is the unit of force?
Answer
(C)
N
8
According to Newton's Third Law, what is the relationship between action and reaction forces?
Answer
(C)
They are equal in magnitude and opposite in direction.
9
Which of the following scenarios describes uniform motion?
Answer
(D)
A car traveling at a constant speed on a straight road.
10
In the context of a distance-time graph, a steeper slope indicates:
Answer
(B)
Faster speed
11
What happens to the direction of the force when moving in a circle?
Answer
(D)
Keeps moving towards the center.
12
How is acceleration calculated?
Answer
(A)
Change in velocity / Time taken
13
In free fall, what is assumed to be negligible?
Answer
(B)
Air resistance
14
Which factors influence air resistance?
Answer
A
B
D
15
How does friction affect the energy in a system?
Answer
(C)
It converts kinetic energy into thermal energy.
16
What is the formula for weight?
Answer
(A)
Weight = mass x gravitational field strength
17
What affects centripetal force?
Answer
A
B
C
18
What happens to objects in free fall?
Answer
(A)
They accelerate downwards due to gravity.
19
What is the velocity of an object which is at rest?
Answer
(C)
0 m/s
20
What can be determined from a ticker tape?
Answer
A
B
C
21
How can the acceleration of a trolley be found using ticker tape?
Answer
(A)
By measuring the distance between dots.
22
What happens to the momentum of an object if the net force acting upon it is zero?
Answer
(C)
It remains constant.
23
What is terminal velocity?
Answer
(B)
The constant speed of an object when the forces are balanced.
24
What does the law of conservation of momentum state?
Answer
(C)
In a closed system, the total momentum remains constant.
25
What does a rocket engine use to produce thrust?
Answer
(B)
Burning fuel.
26
What best describes the relationship between acceleration and velocity?
Answer
A
C
D
27
If you double the speed of an object, what happens to its kinetic energy?
Answer
(C)
It quadruples.
28
If the net force acting on an object is zero, what is its acceleration?
Answer
(C)
Zero
29
What is the name given to the product of a force and the time over which it acts?
Answer
(B)
Impulse
30
Which term refers to the rate of change of position?
Answer
(C)
Speed
31
Which statement describes momentum?
Answer
(C)
Mass multiplied by velocity.
32
In a circular motion, the force pulling an object towards the center is:
Answer
(C)
Centripetal force
33
What is the key to a rocket's movement in space?
Answer
(C)
Expelling exhaust gases.
34
If an object is traveling in a circle at a constant speed, what is changing?
Answer
(D)
Its direction of motion.
35
What happens when two objects collide and stick together?
Answer
(C)
They stick together.
36
What is the relationship between force and acceleration, given a constant mass?
Answer
(A)
Directly proportional
37
If an object covers equal distances in equal intervals of time, what can you infer?
Answer
(D)
All of the above.
38
Which of the following is an example of Newton's Third Law?
Answer
(C)
A rocket taking off.
39
What does the slope of a speed-time graph represent?
Answer
(B)
Acceleration
40
Which factors affect the acceleration of an object falling in air?
Answer
B
C
D
41
What is another term used for centripetal force?
Answer
(B)
Inward force
42
Which are examples of the 'Components as right angles'?
Answer
(A)
Helicopter
43
What type of motion results in a curved line on a distance-time graph?
Answer
(C)
Changing speed
44
What happens to the speed of a ball thrown upwards?
Answer
(B)
Decreases
45
According to Newton's second law, what is the unit of force?
Answer
(C)
N
46
What would happen to the centripetal force if the object is moving in a circle and we decrease the speed?
Answer
(B)
The force decreases.
47
Which of the following represents constant speed in motion graphs?
Answer
A
C
48
Which of the following can be a form of friction?
Answer
A
B
49
What are the effects of air resistance on a falling object?
Answer
(A)
Reduces the object's acceleration.
50
What happens to an object if the net force acting upon it is non-zero?
Answer
(C)
It accelerates.