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A person holds a bundle of hay over his head for 30 minutes an

Science

Class 9

NCERT

Chapter 1: Matter in Our Surroundings

9 questions

Chapter 2: Is Matter Around Us Pure?

13 questions

Chapter 3: Atoms and Molecules

16 questions

Chapter 4: Structure of the Atom

19 questions

Chapter 5: The Fundamental Unit of Life

10 questions

Chapter 6: Tissues

15 questions

Chapter 7: Diversity in Living Organisms

6 questions

Chapter 8: Motion

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Chapter 9: Force and Laws of Motion

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Chapter 10: Work and Energy

23 questions

Can there be displacement of an object in the absence of any force acting on it? Think. Discuss this question with your friends and teacher.

A person holds a bundle of hay over his head for

30

minutes and gets tired. Has he done some work or not? Justify your answer.

An electric heater is rated

1500 W

. How much energy does it use in

10

hours?

View all question

Chapter 11: Sound

25 questions

Chapter 12: Why do We Fall Ill?

6 questions

Chapter 13: Natural Resourses

6 questions

Chapter 14: Improvement in Food Resources

Chapter 15: Gravitation

29 questions

Question

Medium

Solving time: 3 mins

A person holds a bundle of hay over his head for $30$ minutes and gets tired. Has he done some work or not? Justify your answer.

Views: 5,841 students

Updated on: Jan 17, 2023

Book:

Science (NCERT)

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A person holds a bundle of hay over his head for

30

minutes and gets tired. Has he done some work or not? Justify your answer.

10 mins ago

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10 mins ago

Text solutionVerified

The person does not move from his position (no displacement) in spite of applying force on the bundle. Therefore, no work is done.

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Practice more questions from Science (NCERT)

Can there be displacement of an object in the absence of any force acting on it? Think. Discuss this question with your friends and teacher.

A person holds a bundle of hay over his head for

30

minutes and gets tired. Has he done some work or not? Justify your answer.

An electric heater is rated

1500 W

. How much energy does it use in

10

hours?

View all

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Question Text	A person holds a bundle of hay over his head for $30$ minutes and gets tired. Has he done some work or not? Justify your answer.
Updated On	Jan 17, 2023
Topic	Work and Energy
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 8
Upvotes	918
Avg. Video Duration	5 min

Distance above ground	Velocity
5 m 3.2 m 0 m	0 m/s 6 m/s 10 m/s

A person holds a bundle of hay over his head for $30$ minutes and gets tired. Has he done some work or not? Justify your answer.

Text solutionVerified

Filo tutor solutions (8)

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A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or not? Justify your answer.

Text solutionVerified

Filo tutor solutions (8)

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A person holds a bundle of hay over his head for $30$ minutes and gets tired. Has he done some work or not? Justify your answer.