Class 11 Exam > Class 11 Questions > Work done by gravitational force on a man, in...
Start Learning for Free
Work done by gravitational force on a man, in lifting a bucket out of the well by rope tied to the bucket is
- a)negative
- b)positive
- c)zero
- d)infinity
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Work done by gravitational force on a man, in lifting a bucket out of ...
When the man pulls the bucket outside the well the gravitational potential of the man + bucket system increases and hence the work done by the gravitational force is negative.
Free Test
FREE
| Start Free Test |
Community Answer
Work done by gravitational force on a man, in lifting a bucket out of ...
**Answer:**
The work done by a force is given by the equation:
**Work done (W) = Force (F) × Displacement (d) × cosθ**
Where θ is the angle between the force vector and the displacement vector.
In this context, the gravitational force is acting vertically downwards, while the displacement is in the upward direction. Therefore, the angle θ between the force and displacement vectors is 180 degrees.
Let's analyze the options given:
a) Negative: If the angle between the force and displacement vectors is 180 degrees, then cosθ will be equal to -1. Since the force is acting in the opposite direction to the displacement, the work done will be negative.
b) Positive: If the angle between the force and displacement vectors is 0 degrees, then cosθ will be equal to 1. In this case, the force and displacement are in the same direction, so the work done will be positive.
c) Zero: If the angle between the force and displacement vectors is 90 degrees, then cosθ will be equal to 0. In this case, the force is perpendicular to the displacement, so no work is done.
d) Infinity: Work done is a scalar quantity and cannot be infinite.
Since the gravitational force and the upward displacement have an angle of 180 degrees between them, the correct answer is option 'a' - negative. The work done by the gravitational force on the man in lifting the bucket out of the well is negative because the force is acting in the opposite direction to the displacement. This means that the man is doing work against the gravitational force to lift the bucket. The negative sign indicates that the man is expending energy in doing this work.
The work done by a force is given by the equation:
**Work done (W) = Force (F) × Displacement (d) × cosθ**
Where θ is the angle between the force vector and the displacement vector.
In this context, the gravitational force is acting vertically downwards, while the displacement is in the upward direction. Therefore, the angle θ between the force and displacement vectors is 180 degrees.
Let's analyze the options given:
a) Negative: If the angle between the force and displacement vectors is 180 degrees, then cosθ will be equal to -1. Since the force is acting in the opposite direction to the displacement, the work done will be negative.
b) Positive: If the angle between the force and displacement vectors is 0 degrees, then cosθ will be equal to 1. In this case, the force and displacement are in the same direction, so the work done will be positive.
c) Zero: If the angle between the force and displacement vectors is 90 degrees, then cosθ will be equal to 0. In this case, the force is perpendicular to the displacement, so no work is done.
d) Infinity: Work done is a scalar quantity and cannot be infinite.
Since the gravitational force and the upward displacement have an angle of 180 degrees between them, the correct answer is option 'a' - negative. The work done by the gravitational force on the man in lifting the bucket out of the well is negative because the force is acting in the opposite direction to the displacement. This means that the man is doing work against the gravitational force to lift the bucket. The negative sign indicates that the man is expending energy in doing this work.
|
Explore Courses for Class 11 exam
|
|
Top Courses for Class 11View all
Question Description
Work done by gravitational force on a man, in lifting a bucket out of the well by rope tied to the bucket isa)negativeb)positivec)zerod)infinityCorrect answer is option 'A'. Can you explain this answer? for Class 11 2025 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Work done by gravitational force on a man, in lifting a bucket out of the well by rope tied to the bucket isa)negativeb)positivec)zerod)infinityCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 11 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Work done by gravitational force on a man, in lifting a bucket out of the well by rope tied to the bucket isa)negativeb)positivec)zerod)infinityCorrect answer is option 'A'. Can you explain this answer?.
Work done by gravitational force on a man, in lifting a bucket out of the well by rope tied to the bucket isa)negativeb)positivec)zerod)infinityCorrect answer is option 'A'. Can you explain this answer? for Class 11 2025 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Work done by gravitational force on a man, in lifting a bucket out of the well by rope tied to the bucket isa)negativeb)positivec)zerod)infinityCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 11 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Work done by gravitational force on a man, in lifting a bucket out of the well by rope tied to the bucket isa)negativeb)positivec)zerod)infinityCorrect answer is option 'A'. Can you explain this answer?.
Solutions for Work done by gravitational force on a man, in lifting a bucket out of the well by rope tied to the bucket isa)negativeb)positivec)zerod)infinityCorrect answer is option 'A'. 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 Work done by gravitational force on a man, in lifting a bucket out of the well by rope tied to the bucket isa)negativeb)positivec)zerod)infinityCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Work done by gravitational force on a man, in lifting a bucket out of the well by rope tied to the bucket isa)negativeb)positivec)zerod)infinityCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for Work done by gravitational force on a man, in lifting a bucket out of the well by rope tied to the bucket isa)negativeb)positivec)zerod)infinityCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of Work done by gravitational force on a man, in lifting a bucket out of the well by rope tied to the bucket isa)negativeb)positivec)zerod)infinityCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Work done by gravitational force on a man, in lifting a bucket out of the well by rope tied to the bucket isa)negativeb)positivec)zerod)infinityCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 11 tests.
|
|
Explore Courses for Class 11 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!
within 7 days!
Takes less than 10 seconds to signup