Class 9 Exam > Class 9 Questions > An external influence which changes or tends ...
Start Learning for Free
An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:
- a)momentum
- b)force
- c)moment of force
- d)pressure
Correct answer is 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
An external influence which changes or tends to change the state of re...
The slope of the velocity-time graph determines the acceleration.
Most Upvoted Answer
An external influence which changes or tends to change the state of re...
Explanation:
To understand why the answer is option 'B', we need to first understand what acceleration is and how it can be calculated. Acceleration is the rate at which an object changes its velocity. It is a vector quantity, which means it has both magnitude and direction. The formula for acceleration is:
acceleration = change in velocity / time taken
This means that to calculate acceleration, we need to know the change in velocity and the time taken for that change to occur.
How can we determine the acceleration of a moving object?
There are various ways to determine the acceleration of a moving object. Some of them are:
1. Using a speedometer: A speedometer can be used to measure the speed of a moving object at different points in time. By taking the difference between the speeds at two different points in time, we can determine the change in velocity. Dividing this change in velocity by the time taken for it to occur gives us the acceleration.
2. Using a stopwatch and a measured distance: If we know the distance covered by a moving object and the time taken to cover that distance, we can calculate the average speed of the object. By taking the difference between the average speeds at two different points in time, we can determine the change in velocity. Dividing this change in velocity by the time taken for it to occur gives us the acceleration.
3. Using a velocity-time graph: A velocity-time graph shows the change in velocity of a moving object over time. The slope of the graph represents the acceleration of the object. A steeper slope indicates a greater acceleration, while a flatter slope indicates a smaller acceleration.
Therefore, the correct answer to the question is option 'B', which states that the slope of the velocity-time graph can determine the acceleration of a moving object.
To understand why the answer is option 'B', we need to first understand what acceleration is and how it can be calculated. Acceleration is the rate at which an object changes its velocity. It is a vector quantity, which means it has both magnitude and direction. The formula for acceleration is:
acceleration = change in velocity / time taken
This means that to calculate acceleration, we need to know the change in velocity and the time taken for that change to occur.
How can we determine the acceleration of a moving object?
There are various ways to determine the acceleration of a moving object. Some of them are:
1. Using a speedometer: A speedometer can be used to measure the speed of a moving object at different points in time. By taking the difference between the speeds at two different points in time, we can determine the change in velocity. Dividing this change in velocity by the time taken for it to occur gives us the acceleration.
2. Using a stopwatch and a measured distance: If we know the distance covered by a moving object and the time taken to cover that distance, we can calculate the average speed of the object. By taking the difference between the average speeds at two different points in time, we can determine the change in velocity. Dividing this change in velocity by the time taken for it to occur gives us the acceleration.
3. Using a velocity-time graph: A velocity-time graph shows the change in velocity of a moving object over time. The slope of the graph represents the acceleration of the object. A steeper slope indicates a greater acceleration, while a flatter slope indicates a smaller acceleration.
Therefore, the correct answer to the question is option 'B', which states that the slope of the velocity-time graph can determine the acceleration of a moving object.
Free Test
FREE
| Start Free Test |
Community Answer
An external influence which changes or tends to change the state of re...
Uu already know..Work is said to be done if force is applied on the body and there is any displacement..Here the body tends to change the state of rest or uniform motion or its dimensions. .so there is some work being done...so,there is an external influence behind this work i.e.Force...so,(B)Force is d correct answer..
Attention Class 9 Students!
To make sure you are not studying endlessly, EduRev has designed Class 9 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 9.
|
Explore Courses for Class 9 exam
|
|
Similar Class 9 Doubts
Top Courses for Class 9View all
An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer?
Question Description
An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer?.
An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer?.
Solutions for An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer?, a detailed solution for An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer? has been provided alongside types of An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer? tests, examples and also practice Class 9 tests.
|
|
Explore Courses for Class 9 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup