Physics for IGCSE & O level - Forces And Motion (Section 11)
1
If the dots are getting further apart in the ticker-tape, what can you conclude about the movement?
پاسخ دهید(B)
The object is accelerating.
2
What are the units for acceleration?
3
Which of the following describes how an object's velocity changes over time?
4
What is an example of a Newton's third law pair?
پاسخ دهید(B)
The force of the ground on your foot and the force of your foot on the ground.
5
What is the definition of acceleration?
پاسخ دهید(C)
The rate of change of velocity.
6
If an object's velocity is constant, what can be said about its acceleration?
پاسخ دهید(C)
The acceleration is zero.
7
How is the change in momentum calculated?
8
What are the essential aspects for defining velocity?
9
What is the value used in the experiment to measure g (acceleration due to gravity) on the moon?
10
What factors determine how much friction acts between two surfaces?
11
How is the direction of friction determined?
پاسخ دهید(C)
In the opposite direction of the motion.
12
What is the unit for gravitational field strength?
13
What is the significance of the direction in velocity?
پاسخ دهید(B)
It is crucial for understanding the motion of an object.
14
What happens if the dots on the ticker tape are closer to each other?
15
What does the 'average speed' formula involve?
پاسخ دهید(A)
Total distance / Total time
16
If a car starts from rest and accelerates at 2 m/s² for 5 seconds, what is its final velocity?
17
Which scenario describes a car's acceleration?
پاسخ دهید(B)
The car increases its speed from 20 km/h to 40 km/h.
18
What is the effect of streamlining an object's shape on the air resistance it experiences?
پاسخ دهید(C)
Air resistance decreases.
19
Which quantities are considered as vector quantities?
20
If an object is experiencing a net force, what must also be true?
پاسخ دهید(B)
The object's direction is changing.
21
What is a force that opposes motion between two surfaces?
22
Which of the following is an example of Newton's Third Law in action?
23
What are the units for mass?
24
What is the unit for velocity?
25
Which of the following is a correct statement of Newton's Third Law?
پاسخ دهید(C)
For every action, there is an equal and opposite reaction.
26
What does the slope of a velocity-time graph represent?
27
In a straight line, what is the direction of motion indicated by?
پاسخ دهید(C)
Either a plus or minus sign.
28
What type of force is required to change the direction of motion?
29
Which of the following statements are true regarding friction?
30
What is the unit of force?
31
What does a horizontal line on a speed-time graph represent?
32
Which of the following situations represents zero acceleration?
پاسخ دهید(C)
A car moving at a constant velocity.
33
What is terminal velocity?
پاسخ دهید(A)
The maximum speed an object can reach.
34
What direction is the force acting on an object that is moving in a circle?
پاسخ دهید(C)
Towards the center of the circle.
35
What is meant by 'resultant force'?
پاسخ دهید(A)
The total force acting on an object.
36
If the net force on a moving object is zero, what does that imply about the object's velocity?
پاسخ دهید(C)
The velocity is constant.
37
Which of the following are types of friction?
38
How does the surface of an object affect friction?
پاسخ دهید(D)
The rougher the surface, the greater the friction.
39
What is an example of a dynamic force?
40
If an object is experiencing a constant centripetal force, what is changing?
41
What type of graph is used to show the motion of an object?
42
What is a vector quantity?
43
On which of the following is speed-time graph used to determine?
44
Which of the following are examples of motion graphs?
45
How does the mass of an object affect its momentum?
پاسخ دهید(B)
Increased mass, increases momentum.
46
What represents acceleration on a speed-time graph?
47
Which of the following is a factor affecting the strength of gravitational force?
پاسخ دهید(B)
The distance between the objects.
48
What is deceleration also called?
49
If you increase the mass of an object, what happens to its inertia?
50
What does air resistance depend on?
