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Question 18: Is it possible that an object is in the state of
Science Exemplar
Science Exemplar

Class 9

NCERT Exemplar

Publisher:
NCERT
Subject:
Science
1

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2

Chapter 2: Is Matter Around Us Pure?

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3

Chapter 3: Atoms and Molecules

46 questions

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4

Chapter 4: Structure of the Atom

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5

Chapter 5: The Fundamental Unit of Life

52 questions

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6

Chapter 6: Tissues

50 questions

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7

Chapter 7: Diversity in Living Organisms

51 questions

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8

Chapter 8: Motion

16 questions

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9

Chapter 9: Force and Laws of Motion

18 questions

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10

Chapter 10: Gravitation

26 questions

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11

Chapter 11: Work and Energy

27 questions

Q1
Question 17: The velocity of a body moving in a straight line is increased by applying a constant force F, for some distance in the direction of the motion. Prove that the increase in the kinetic energy of the body is equal to the work done by the force on the body.
Q2
Question 18: Is it possible that an object is in the state of accelerated motion due to external force acting on it, but no work is being done by the force. Explain it with an example.
Q3
Question 19: A ball is dropped from a height of 10 m. If the energy of the ball reduces by 40% after striking the ground, how much high can the ball bounce back? (g = )
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12

Chapter 12: Sound

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13

Chapter 13: Why do We Fall Ill?

39 questions

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14

Chapter 14: Natural Resourses

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15

Chapter 15: Improvement in Food Resources

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Question

Question 18: Is it possible that an object is in the state of accelerated motion due to external force acting on it, but no work is being done by the force. Explain it with an example.

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Updated on: Sep 6, 2022

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Answer: Yes, it is possible that an object is in the state of accelerated motion due to external force acting on it, but no work is being done by the force. When a body is rotating uniformly in a circular path, the direction of centripetal force and the displacement are perpendicular to each other. In this condition, the work done will be zero.
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Question Text
Question 18: Is it possible that an object is in the state of accelerated motion due to external force acting on it, but no work is being done by the force. Explain it with an example.
Updated OnSep 6, 2022
TopicWork and Energy
SubjectScience
ClassClass 9
Answer TypeText solution:1 Video solution: 1
Upvotes159
Avg. Video Duration4 min