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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 46:
Give two examples where a body possesses both, kinetic energy as well as potential energy.
Q2
Question 50:
What type of energy is possessed :
(a) by the stretched rubber strings of a catapult?
(b) by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult?
Figure
(a) by the stretched rubber strings of a catapult?
(b) by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult?
Figure
Q3
Question 56:
(a) What do you understand by the kinetic energy of a body?
(b) A body is thrown vertically upwards. Its velocity goes on decreasing. What happens to its kinetic energy as its velocity becomes zero?
(c) A horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, What is the ration of their kinetic energies?
View all question(b) A body is thrown vertically upwards. Its velocity goes on decreasing. What happens to its kinetic energy as its velocity becomes zero?
(c) A horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, What is the ration of their kinetic energies?
5
Chapter 5: Sound
162 questions
Question
Question 50:
What type of energy is possessed :
(a) by the stretched rubber strings of a catapult?
(b) by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult?
Figure
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Text solution
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Answer:
(a) The stretched rubber string of a catapult possesses potential energy, as the work done to change the shape of the rubber string is stored in it.
(b) The stone possesses kinetic energy because on releasing the rubber string of the catapult, potential energy of the rubber string is transformed into the kinetic energy of the stone thrown.
(b) The stone possesses kinetic energy because on releasing the rubber string of the catapult, potential energy of the rubber string is transformed into the kinetic energy of the stone thrown.
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Practice more questions from Physics (Lakhmir Singh)
Q1
Question 46:
Give two examples where a body possesses both, kinetic energy as well as potential energy.
Q2
Question 50:
What type of energy is possessed :
(a) by the stretched rubber strings of a catapult?
(b) by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult?
Figure
(a) by the stretched rubber strings of a catapult?
(b) by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult?
Figure
Q3
Question 56:
(a) What do you understand by the kinetic energy of a body?
(b) A body is thrown vertically upwards. Its velocity goes on decreasing. What happens to its kinetic energy as its velocity becomes zero?
(c) A horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, What is the ration of their kinetic energies?
View all(b) A body is thrown vertically upwards. Its velocity goes on decreasing. What happens to its kinetic energy as its velocity becomes zero?
(c) A horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, What is the ration of their kinetic energies?
Practice questions from Physics (Lakhmir Singh)
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| Question Text | Question 50:
What type of energy is possessed : (a) by the stretched rubber strings of a catapult? (b) by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult? Figure |
| Topic | Work and Energy |
| Subject | Science |
| Class | Class 9 |
| Answer Type | Text solution:1 |
| Upvotes | 40 |
