Class 11 Exam > Class 11 Questions > Which of the following is not correct for the...
Start Learning for Free
Which of the following is not correct for the condition for work not to be done:
- a)force and displacement are perpendicular to each other
- b)force and displacement are at 180 degrees with each other
- c)displacement is zero, though force is non-zero
- d)force is zero
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Which of the following is not correct for the condition for work not t...
There are two conditions for zero work done after applying force physically:
1. If the displacement is zero whether how much force is applied on the object in this case work done will be zero Example . If you will push the wall of house with much force so in this case your work done count will be zero.
2. As, W=Fd cosx where x is the angle between force and displacement; if the angle is 90 i.e force and displacement are perpendicular to each other, then W = 0.
This question is part of UPSC exam. View all Class 11 courses
Most Upvoted Answer
Which of the following is not correct for the condition for work not t...
If a force acting on a body has a component in the direction of displacement, then the work done by the force is positive. Hence when a body falls freely under the influence of gravity the work done by the gravity is positive.
Community Answer
Which of the following is not correct for the condition for work not t...
Explanation:
The condition for work not to be done is when either the force or the displacement is zero. In other words, work is not done when there is no force acting on an object or when there is no displacement of the object.
Let's analyze each option to determine which one is not correct:
a) Force and displacement are perpendicular to each other:
When a force acts on an object and the displacement is perpendicular to the force, work is still done. The work done in this case is given by the formula: Work = force * displacement * cos(theta), where theta is the angle between the force and the displacement vectors. Since cos(90 degrees) = 0, the work done would be zero only if either the force or the displacement is zero. Therefore, option 'a' is not the correct answer.
b) Force and displacement are at 180 degrees with each other:
When the force and displacement are in opposite directions (180 degrees apart), work is indeed done. The work done in this case is given by the formula: Work = force * displacement * cos(theta), where theta is the angle between the force and the displacement vectors. Since cos(180 degrees) = -1, the work done would be negative. Therefore, option 'b' is the correct answer.
c) Displacement is zero, though force is non-zero:
If the displacement of an object is zero, it means that the object is not moving. In this case, no work is done even if there is a non-zero force acting on the object. Therefore, option 'c' is not the correct answer.
d) Force is zero:
If there is no force acting on an object, no work is done regardless of the displacement. Therefore, option 'd' is a correct condition for work not to be done.
Conclusion:
The correct answer is option 'B' because work is done when the force and displacement are at 180 degrees with each other.
The condition for work not to be done is when either the force or the displacement is zero. In other words, work is not done when there is no force acting on an object or when there is no displacement of the object.
Let's analyze each option to determine which one is not correct:
a) Force and displacement are perpendicular to each other:
When a force acts on an object and the displacement is perpendicular to the force, work is still done. The work done in this case is given by the formula: Work = force * displacement * cos(theta), where theta is the angle between the force and the displacement vectors. Since cos(90 degrees) = 0, the work done would be zero only if either the force or the displacement is zero. Therefore, option 'a' is not the correct answer.
b) Force and displacement are at 180 degrees with each other:
When the force and displacement are in opposite directions (180 degrees apart), work is indeed done. The work done in this case is given by the formula: Work = force * displacement * cos(theta), where theta is the angle between the force and the displacement vectors. Since cos(180 degrees) = -1, the work done would be negative. Therefore, option 'b' is the correct answer.
c) Displacement is zero, though force is non-zero:
If the displacement of an object is zero, it means that the object is not moving. In this case, no work is done even if there is a non-zero force acting on the object. Therefore, option 'c' is not the correct answer.
d) Force is zero:
If there is no force acting on an object, no work is done regardless of the displacement. Therefore, option 'd' is a correct condition for work not to be done.
Conclusion:
The correct answer is option 'B' because work is done when the force and displacement are at 180 degrees with each other.
Attention Class 11 Students!
To make sure you are not studying endlessly, EduRev has designed Class 11 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 11.
|
|
Explore Courses for Class 11 exam
|
|
Top Courses for Class 11View all
Which of the following is not correct for the condition for work not to be done:a)force and displacement are perpendicular to each otherb)force and displacement are at 180 degrees with each otherc)displacement is zero, though force is non-zerod)force is zeroCorrect answer is option 'B'. Can you explain this answer?
Question Description
Which of the following is not correct for the condition for work not to be done:a)force and displacement are perpendicular to each otherb)force and displacement are at 180 degrees with each otherc)displacement is zero, though force is non-zerod)force is zeroCorrect answer is option 'B'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Which of the following is not correct for the condition for work not to be done:a)force and displacement are perpendicular to each otherb)force and displacement are at 180 degrees with each otherc)displacement is zero, though force is non-zerod)force is zeroCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is not correct for the condition for work not to be done:a)force and displacement are perpendicular to each otherb)force and displacement are at 180 degrees with each otherc)displacement is zero, though force is non-zerod)force is zeroCorrect answer is option 'B'. Can you explain this answer?.
Which of the following is not correct for the condition for work not to be done:a)force and displacement are perpendicular to each otherb)force and displacement are at 180 degrees with each otherc)displacement is zero, though force is non-zerod)force is zeroCorrect answer is option 'B'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Which of the following is not correct for the condition for work not to be done:a)force and displacement are perpendicular to each otherb)force and displacement are at 180 degrees with each otherc)displacement is zero, though force is non-zerod)force is zeroCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is not correct for the condition for work not to be done:a)force and displacement are perpendicular to each otherb)force and displacement are at 180 degrees with each otherc)displacement is zero, though force is non-zerod)force is zeroCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Which of the following is not correct for the condition for work not to be done:a)force and displacement are perpendicular to each otherb)force and displacement are at 180 degrees with each otherc)displacement is zero, though force is non-zerod)force is zeroCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 11.
Download more important topics, notes, lectures and mock test series for Class 11 Exam by signing up for free.
Here you can find the meaning of Which of the following is not correct for the condition for work not to be done:a)force and displacement are perpendicular to each otherb)force and displacement are at 180 degrees with each otherc)displacement is zero, though force is non-zerod)force is zeroCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which of the following is not correct for the condition for work not to be done:a)force and displacement are perpendicular to each otherb)force and displacement are at 180 degrees with each otherc)displacement is zero, though force is non-zerod)force is zeroCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Which of the following is not correct for the condition for work not to be done:a)force and displacement are perpendicular to each otherb)force and displacement are at 180 degrees with each otherc)displacement is zero, though force is non-zerod)force is zeroCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Which of the following is not correct for the condition for work not to be done:a)force and displacement are perpendicular to each otherb)force and displacement are at 180 degrees with each otherc)displacement is zero, though force is non-zerod)force is zeroCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following is not correct for the condition for work not to be done:a)force and displacement are perpendicular to each otherb)force and displacement are at 180 degrees with each otherc)displacement is zero, though force is non-zerod)force is zeroCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Class 11 tests.
|
|
Explore Courses for Class 11 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