Physics for IGCSE & O level - Forces And Motion (Section 9)
1
What is the name of the force that opposes motion?
2
What does the slope indicate in a speed-time graph?
3
What is the definition of 'impulse'?
پاسخ دهید(B)
The force applied over a period of time.
4
What does the area under the line on the speed-time graph represent?
5
What are the effects of unbalanced forces?
6
Which of the following will increase the friction between two surfaces?
7
What represents speed on a distance-time graph?
8
Which of the following is directly related to how high a thrown ball reaches?
9
Which factor, in particular, helps determine the amount of momentum an object has?
10
If a car is traveling at a steady 15 m/s for 9 s, what is the distance manifested on a graph?
11
What is the weight of an object on the moon compared to its weight on Earth?
پاسخ دهید(C)
The weight is less on the moon.
12
Which of these can be found by studying a velocity-time graph?
13
Which of the following describes the force acting on the car moving on the surface?
14
What can the area under a speed-time graph be used to determine?
15
What does a negative sign in velocity indicate?
پاسخ دهید(B)
The object is moving in the opposite direction.
16
What kind of graph represents an object that has constant acceleration?
پاسخ دهید(D)
A straight line on a speed-time graph
17
What factors are considered in determining average speed?
18
Inertia is best described as...
پاسخ دهید(B)
The tendency of an object to resist changes in its motion.
19
What indicates the acceleration on the graph?
20
What is the relationship between an object's mass and its resistance to acceleration?
پاسخ دهید(B)
More mass means more resistance to acceleration.
21
In a distance-time graph, what does the gradient of the line represent?
22
What can be used to determine the acceleration of a trolley in a lab?
23
How is impulse related to momentum?
پاسخ دهید(B)
Impulse is the change in momentum.
24
پاسخ دهید(C)
The speed of something in a particular direction.
25
Which of the following will experience the greatest change in momentum if the same force is applied for the same amount of time?
26
What is the difference between scalar and vector quantities?
پاسخ دهید(C)
Scalars have only magnitude, vectors have both magnitude and direction.
27
What is the relationship between the mass of an object and its weight on Earth?
پاسخ دهید(C)
Weight is directly proportional to mass.
28
When does an object have a uniform acceleration?
پاسخ دهید(D)
When the net force acting on the object is constant.
29
What happens to a ball's speed when it is thrown upward, ignoring air resistance?
پاسخ دهید(B)
The speed decreases constantly.
30
What does it mean for a system to be 'closed' in terms of momentum?
پاسخ دهید(A)
No external forces act on the system.
31
What would happen to a moving object if no force acted on it?
پاسخ دهید(C)
It would maintain its speed and direction.
32
How is the rate of change of momentum calculated?
33
What does evenly spaced dots on a ticker tape mean?
پاسخ دهید(D)
Object has a constant velocity.
34
If two objects have the same mass, but one is on Earth and the other is on the Moon, which statement is true?
35
پاسخ دهید(B)
Quantities that only have magnitude.
36
What does a positive sign in velocity normally indicate?
پاسخ دهید(B)
The object is moving in a forward direction.
37
What type of quantity is acceleration?
38
Which quantity does a curved line in a speed-time graph indicate?
پاسخ دهید(D)
Non-uniform acceleration.
39
If a ball is thrown upward, at what point does it have zero instantaneous velocity?
40
What are the common examples of forces?
41
What factors affect the amount of friction acting on an object?
42
What is the relationship between average speed and instantaneous speed?
پاسخ دهید(B)
Instantaneous speed is the speed at a specific moment, average speed over a period.
43
What does a flat line on a distance-time graph show?
44
If a ball is thrown upward, what happens to its velocity as it rises?
پاسخ دهید(B)
Decreases at a constant rate.
45
Which of the following are vector quantities?
46
Which of the following would result in a horizontal line on a velocity-time graph?
47
What does it mean for a car to have a negative acceleration?
48
Which of the following examples best represents Newton's Second Law of Motion?
پاسخ دهید(B)
A stationary box being pushed and accelerating.
49
What is the correct unit for force?
50
In which direction does acceleration occur?
پاسخ دهید(C)
In the direction of the net force.
