Grade 8 Exam > Grade 8 Questions > Choose the correctly matched pair.a) Work don...
Start Learning for Free
Choose the correctly matched pair.
- a)Work done when force is zero - Positive work
- b)Work done when force and displacement are in opposite directions - Negative work
- c)Work done when force is applied but no displacement occurs - Work is done
- d)Work done when force and displacement are perpendicular - Maximum work
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Choose the correctly matched pair.a) Work done when force is zero - Po...
- Let's evaluate each option based on the principles described in the text:
- Option A: (a) Work done when force is zero - Positive work This is incorrect. When the force applied is zero, no work is done, regardless of any displacement.
- Option B: (b) Work done when force and displacement are in opposite directions - Negative work This is correct. When the force acts in the opposite direction to the displacement, the work done is negative, as explained in the text.
- Option C: (c) Work done when force is applied but no displacement occurs - Work is done This is incorrect. For work to be done according to the scientific definition, there must be both force and displacement. If there's no displacement, no work is done.
- Option D: (d) Work done when force and displacement are perpendicular - Maximum work This is incorrect. When force and displacement are perpendicular, no work is done because the cosine of 90 degrees is zero, making the work zero.
- Therefore, the correctly matched pair is Option B.
Most Upvoted Answer
Choose the correctly matched pair.a) Work done when force is zero - Po...
Understanding Work Done in Physics
In physics, the concept of work is defined as the transfer of energy that occurs when a force is applied to an object, causing it to move. The relationship between force, displacement, and the angle between them is crucial in determining the nature of work done.
Correct Answer Explanation: Option B
- Work Done with Opposite Directions
When the force applied to an object is in the opposite direction to its displacement, the work done is considered negative. This means that the force is acting against the motion, effectively removing energy from the system. Common examples include frictional forces where the friction opposes the motion of a sliding object.
Why Other Options are Incorrect
- Option A: Work Done When Force is Zero
If the force is zero, then no work is done at all, not positive work.
- Option C: Force Applied but No Displacement
If there is no displacement, then no work is done, irrespective of the force applied.
- Option D: Force and Displacement are Perpendicular
When force and displacement are perpendicular, the work done is zero, not maximum. This is because the angle (90 degrees) results in no effective force contributing to the displacement.
Conclusion
Understanding these principles is essential for grasping the fundamental concepts in physics. Option B accurately describes a scenario where negative work occurs, highlighting the relationship between force and displacement effectively.
In physics, the concept of work is defined as the transfer of energy that occurs when a force is applied to an object, causing it to move. The relationship between force, displacement, and the angle between them is crucial in determining the nature of work done.
Correct Answer Explanation: Option B
- Work Done with Opposite Directions
When the force applied to an object is in the opposite direction to its displacement, the work done is considered negative. This means that the force is acting against the motion, effectively removing energy from the system. Common examples include frictional forces where the friction opposes the motion of a sliding object.
Why Other Options are Incorrect
- Option A: Work Done When Force is Zero
If the force is zero, then no work is done at all, not positive work.
- Option C: Force Applied but No Displacement
If there is no displacement, then no work is done, irrespective of the force applied.
- Option D: Force and Displacement are Perpendicular
When force and displacement are perpendicular, the work done is zero, not maximum. This is because the angle (90 degrees) results in no effective force contributing to the displacement.
Conclusion
Understanding these principles is essential for grasping the fundamental concepts in physics. Option B accurately describes a scenario where negative work occurs, highlighting the relationship between force and displacement effectively.
|
Explore Courses for Grade 8 exam
|
|
Top Courses for Grade 8View all
Choose the correctly matched pair.a) Work done when force is zero - Positive workb) Work done when force and displacement are in opposite directions - Negative workc) Work done when force is applied but no displacement occurs - Work is doned) Work done when force and displacement are perpendicular - Maximum workCorrect answer is option 'B'. Can you explain this answer?
Question Description
Choose the correctly matched pair.a) Work done when force is zero - Positive workb) Work done when force and displacement are in opposite directions - Negative workc) Work done when force is applied but no displacement occurs - Work is doned) Work done when force and displacement are perpendicular - Maximum workCorrect answer is option 'B'. Can you explain this answer? for Grade 8 2025 is part of Grade 8 preparation. The Question and answers have been prepared according to the Grade 8 exam syllabus. Information about Choose the correctly matched pair.a) Work done when force is zero - Positive workb) Work done when force and displacement are in opposite directions - Negative workc) Work done when force is applied but no displacement occurs - Work is doned) Work done when force and displacement are perpendicular - Maximum workCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Grade 8 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Choose the correctly matched pair.a) Work done when force is zero - Positive workb) Work done when force and displacement are in opposite directions - Negative workc) Work done when force is applied but no displacement occurs - Work is doned) Work done when force and displacement are perpendicular - Maximum workCorrect answer is option 'B'. Can you explain this answer?.
Choose the correctly matched pair.a) Work done when force is zero - Positive workb) Work done when force and displacement are in opposite directions - Negative workc) Work done when force is applied but no displacement occurs - Work is doned) Work done when force and displacement are perpendicular - Maximum workCorrect answer is option 'B'. Can you explain this answer? for Grade 8 2025 is part of Grade 8 preparation. The Question and answers have been prepared according to the Grade 8 exam syllabus. Information about Choose the correctly matched pair.a) Work done when force is zero - Positive workb) Work done when force and displacement are in opposite directions - Negative workc) Work done when force is applied but no displacement occurs - Work is doned) Work done when force and displacement are perpendicular - Maximum workCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Grade 8 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Choose the correctly matched pair.a) Work done when force is zero - Positive workb) Work done when force and displacement are in opposite directions - Negative workc) Work done when force is applied but no displacement occurs - Work is doned) Work done when force and displacement are perpendicular - Maximum workCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Choose the correctly matched pair.a) Work done when force is zero - Positive workb) Work done when force and displacement are in opposite directions - Negative workc) Work done when force is applied but no displacement occurs - Work is doned) Work done when force and displacement are perpendicular - Maximum workCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Grade 8.
Download more important topics, notes, lectures and mock test series for Grade 8 Exam by signing up for free.
Here you can find the meaning of Choose the correctly matched pair.a) Work done when force is zero - Positive workb) Work done when force and displacement are in opposite directions - Negative workc) Work done when force is applied but no displacement occurs - Work is doned) Work done when force and displacement are perpendicular - Maximum workCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Choose the correctly matched pair.a) Work done when force is zero - Positive workb) Work done when force and displacement are in opposite directions - Negative workc) Work done when force is applied but no displacement occurs - Work is doned) Work done when force and displacement are perpendicular - Maximum workCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Choose the correctly matched pair.a) Work done when force is zero - Positive workb) Work done when force and displacement are in opposite directions - Negative workc) Work done when force is applied but no displacement occurs - Work is doned) Work done when force and displacement are perpendicular - Maximum workCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Choose the correctly matched pair.a) Work done when force is zero - Positive workb) Work done when force and displacement are in opposite directions - Negative workc) Work done when force is applied but no displacement occurs - Work is doned) Work done when force and displacement are perpendicular - Maximum workCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Choose the correctly matched pair.a) Work done when force is zero - Positive workb) Work done when force and displacement are in opposite directions - Negative workc) Work done when force is applied but no displacement occurs - Work is doned) Work done when force and displacement are perpendicular - Maximum workCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Grade 8 tests.
|
|
Explore Courses for Grade 8 exam
|
|
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