Physics
Class 9
Lakhmir Singh
1
Chapter 1: Motion
117 questions
2
Chapter 2: Force and Laws of Motion
114 questions
3
Chapter 3: Gravitation
157 questions
4
Chapter 4: Work and Energy
128 questions
Q1
Question 67:
Each of the following statement describes a force acting. Which force is causing work to be done?
(a) the weight of a book at rest on a table
(b) the pull of a moving railway engine on its coaches
(b) the tension in an elastic band wrapped around a parcel
(d) the push of a person's feet when standing on the floor
(a) the weight of a book at rest on a table
(b) the pull of a moving railway engine on its coaches
(b) the tension in an elastic band wrapped around a parcel
(d) the push of a person's feet when standing on the floor
Q2
Question 69:
Which of the following does not posses the ability to do work not because of motion?
(a) a sparrow flying in the sky
(b) a sparrow moving slowly on the ground
(c) a sparrow in the nest on a tree
(d) a squirrel going up a tree
(a) a sparrow flying in the sky
(b) a sparrow moving slowly on the ground
(c) a sparrow in the nest on a tree
(d) a squirrel going up a tree
Q3
Question 70:
A stone is thrown upwards as shown in the diagram. When it reaches P, which of the following has the greatest value of the stone?
Figure
(a) its acceleration
(b) its kinetic energy
(c) its potential energy
(d) its weight
View all questionFigure
(a) its acceleration
(b) its kinetic energy
(c) its potential energy
(d) its weight
5
Chapter 5: Sound
162 questions
Question
Question 69:
Which of the following does not posses the ability to do work not because of motion?
(a) a sparrow flying in the sky
(b) a sparrow moving slowly on the ground
(c) a sparrow in the nest on a tree
(d) a squirrel going up a tree
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Text solution
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Answer:
We will justify all statements one by one as,
(a) A sparrow flying in the sky possesses kinetic energy, which can be transformed into work.
(b) A sparrow moving slowly on the ground possesses kinetic energy, which can be transformed into work.
(c) A sparrow in the nest does not possess any kinetic energy as it is at rest. It does not possess the ability to do work in terms of motion of the body.
(d) A squirrel going up a tree possesses kinetic energy, which can be transformed into work.
Therefore, the answer is:
(c) A sparrow in the nest of a tree.
(a) A sparrow flying in the sky possesses kinetic energy, which can be transformed into work.
(b) A sparrow moving slowly on the ground possesses kinetic energy, which can be transformed into work.
(c) A sparrow in the nest does not possess any kinetic energy as it is at rest. It does not possess the ability to do work in terms of motion of the body.
(d) A squirrel going up a tree possesses kinetic energy, which can be transformed into work.
Therefore, the answer is:
(c) A sparrow in the nest of a tree.
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Practice more questions from Physics (Lakhmir Singh)
Q1
Question 67:
Each of the following statement describes a force acting. Which force is causing work to be done?
(a) the weight of a book at rest on a table
(b) the pull of a moving railway engine on its coaches
(b) the tension in an elastic band wrapped around a parcel
(d) the push of a person's feet when standing on the floor
(a) the weight of a book at rest on a table
(b) the pull of a moving railway engine on its coaches
(b) the tension in an elastic band wrapped around a parcel
(d) the push of a person's feet when standing on the floor
Q2
Question 69:
Which of the following does not posses the ability to do work not because of motion?
(a) a sparrow flying in the sky
(b) a sparrow moving slowly on the ground
(c) a sparrow in the nest on a tree
(d) a squirrel going up a tree
(a) a sparrow flying in the sky
(b) a sparrow moving slowly on the ground
(c) a sparrow in the nest on a tree
(d) a squirrel going up a tree
Q3
Question 70:
A stone is thrown upwards as shown in the diagram. When it reaches P, which of the following has the greatest value of the stone?
Figure
(a) its acceleration
(b) its kinetic energy
(c) its potential energy
(d) its weight
View allFigure
(a) its acceleration
(b) its kinetic energy
(c) its potential energy
(d) its weight
Practice questions from Physics (Lakhmir Singh)
Question 1
Views: 5,163
(a) does not change
(b) becomes twice that of initial potential energy
(c) becomes 4 times that of initial potential energy
(d) becomes 16 times that of initial potential energy
Question 2
Views: 5,191
Figure
(a) its acceleration
(b) its kinetic energy
(c) its potential energy
(d) its weight
Question 4
Views: 5,543
(a) acceleration
(b) momentum
(c) potential energy
(d) kinetic energy
Practice more questions from Work and Energy
Practice questions on similar concepts asked by Filo students
Question 3
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| Question Text | Question 69:
Which of the following does not posses the ability to do work not because of motion? (a) a sparrow flying in the sky (b) a sparrow moving slowly on the ground (c) a sparrow in the nest on a tree (d) a squirrel going up a tree |
| Updated On | Mar 2, 2023 |
| Topic | Work and Energy |
| Subject | Science |
| Class | Class 9 |
| Answer Type | Text solution:1 Video solution: 1 |
| Upvotes | 148 |
| Avg. Video Duration | 9 min |
