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Physics for IGCSE & O level - Forces And Motion (Section 1)

1
What is the gradient of a speed-time graph representing?
Answer
(B)
Acceleration
2
If the speed is decreased in a circle, what will happen to the centripetal force?
Answer
(B)
It decreases.
3
Which of the following statements is true regarding acceleration?
Answer
A
C
D
4
The quantity 'force x time' is called:
Answer
(C)
Impulse
5
What happens to the total momentum of the system before and after a collision?
Answer
(C)
It remains the same.
6
What is the unit of mass?
Answer
(B)
kg
7
What are the units of acceleration?
Answer
(D)
m/s^2
8
What provides the force to keep a satellite in orbit around Earth?
Answer
(C)
Earth's gravity.
9
If a car's velocity is decreasing, it's experiencing:
Answer
(C)
Deceleration
10
What causes an object to change direction?
Answer
(C)
A net force perpendicular to its motion.
11
What is the direction of the reaction force when a person is jumping on the ground?
Answer
(B)
Upward
12
If an object's speed is constant, what does its acceleration equal?
Answer
(B)
0 m/s²
13
What happens if the speed is the same in a collision?
Answer
(A)
The velocity changes.
14
Which of the following will affect the centripetal force needed for an object to move in a circle?
Answer
A
C
D
15
What should be considered when adding vectors?
Answer
(C)
Both magnitude and direction
16
Which of the following is true about a car moving at a constant speed?
Answer
A
B
C
D
17
What does the area under a speed-time graph numerically represent?
Answer
(B)
Displacement
18
What is the instantaneous speed of an object?
Answer
(B)
The speed at a specific moment in time
19
What is inertia?
Answer
(D)
The tendency of an object to resist changes in velocity.
20
Which of these is NOT a vector quantity?
Answer
(D)
Speed
21
What does the term "velocity" refer to?
Answer
(C)
Speed in a specific direction
22
What does a straight line with a positive slope on a speed-time graph represent?
Answer
(B)
Constant acceleration
23
If an object is moving at a constant speed in a circular path, is its acceleration zero?
Answer
(B)
No
24
What does a straight diagonal line on a distance-time graph signify?
Answer
(A)
Constant speed
25
In circular motion, what is the direction of centripetal force?
Answer
(C)
Towards the center of the circle
26
Which statement describes Newton's third law of motion?
Answer
(C)
For every action, there is an equal and opposite reaction.
27
If a 5 kg object is moving at 10 m/s, what is its kinetic energy?
Answer
(B)
50 J
28
What is the relation between the total momentum before and after a collision, provided there is no external force?
Answer
(C)
The momentum remains constant.
29
Which of these are vectors?
Answer
(B)
Force
30
What is the effect of an unbalanced force?
Answer
(B)
Change in direction
31
If a car is moving in a circle, what force keeps it moving in that circle?
Answer
(C)
Centripetal force.
32
What does the centripetal force do to an object in circular motion?
Answer
(C)
It changes the direction of its velocity.
33
Which statement best describes the motion of an object with uniform acceleration?
Answer
(A)
Its speed changes at a constant rate.
34
Which of the following are examples of vectors?
Answer
B
D
35
Which quantity is scalar?
Answer
(C)
Time
36
Which factors contribute to the air resistance experienced by a falling object?
Answer
B
C
37
What are the components that make a rocket go faster?
Answer
(A)
Fuel and oxidant.
38
Which of the following are examples of scalar quantities?
Answer
A
B
D
39
What is the displacement if an object travels around a circular path and returns to the starting point?
Answer
(B)
Zero.
40
If an object is experiencing zero acceleration, what can we conclude about the forces acting on it?
Answer
(B)
The net force acting on it is zero.
41
In an elastic collision, which quantity is conserved?
Answer
A
B
42
Which of the following is TRUE about motion graphs?
Answer
A
B
D
43
What does the 'g' in acceleration due to gravity stand for?
Answer
(A)
Gravity
44
If an object is speeding up, what is happening to its velocity?
Answer
(C)
The velocity is increasing
45
Which statements are true about motion graphs?
Answer
A
D
46
Which unit represents acceleration?
Answer
(C)
m/s²
47
What does the term 'uniform acceleration' imply?
Answer
(D)
The acceleration is constant.
48
Which of the following is NOT a unit of speed?
Answer
(D)
meters per second squared (m/s²)
49
What does a horizontal line on a speed-time graph indicate?
Answer
(B)
Constant speed
50
What would happen if you remove the contact force?
Answer
(B)
The object will continue moving in a straight line.