Value Based Questions in Science for Class 9 Chapter 11 Work, Power and Energy

These Solutions are part of Value Based Questions in Science for Class 9. Here we have given Value Based Questions in Science for Class 9 Chapter 11 Work, Power and Energy

VALUE BASED QUESTIONS

Question 1.
Akshit is a student of class IX. He was waiting for a bus on a bus stand. He saw an old man trying to keep his box on the roof of a bus but was unable to do so. Akshit picked up his box and placed the box on the roof of the bus. The old man thanked Akshit.
Answer the following questions based on the above paragraph.

  1. Is the work done by Akshit while placing the box on the roof of the bus positive or negative ?
  2. Is the work done by gravity on the box is positive or negative ?
  3. What values are shown by Akshit ?

Answer:

  1. Positive,
  2. Negative,
  3. Akshit is helpful. He believes in helping old people. He has dignity of labour.

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Question 2.
Rajiv is a student of class IX. He bought a toy gun from the market. The bullets used in gun were made of rubber. His mother asked Rajiv not to fire bullets on the window panes. Rajiv went to a park and fired bullets on a displaying screen made of plastic. Rajiv’s friend Rohan objected the action of Rajiv. Rajiv started quarelling with Rohan.
Answer the following questions based on above paragraph.

  1. Name the type of energy stored in the spring of gun.
  2. Name the type of energy of a moving bullet.
  3. What values are shown by Rohan ?
  4. Comment on the attitude of Rajiv.

Answer:

  1. Elastic potential energy,
  2. Kinetic energy.
  3. According to Rohan, one must not destroy or disfigure the public or private property. It is sin and crime.
  4. Rajiv’s attitude is undesirable. He has no right to destroy the public property. He must be ashamed of his action.

Question 3.
Ramesh was walking on a road in the morning. He found that an old mail was lying on a road side. Ramesh touched the body of the old man. His body was very cold. Ramesh rubbed the hands and feet of the old man. The old man opened his eye. Ramesh helped the old man to reach his home.
Answer the following questions based on above paragraph.

  1. Why hands become warm, when rubbed ?
  2. What values are shown by Ramesh ?

Answer:

  1. When hands are rubbed against each other, mechanical energy is converted into heat energy. Therefore, hands become warm.
  2. Ramesh is helpful, feels concerned for others. He has high degree of general awareness.

Question 4.
An old man was standing on a bus stand carrying a very heavy luggage. Saurabh was looking at the old man and finding him uncomfortable, requested him to put down the luggage and helped him in doing so.
(a) Did the old man do any work while holding the luggage ?
(b) What is the equation for work done against gravity ?
(c) Why did Saurabh ask the old man to put down the luggage ? (CBSE 2015)
Answer:
(a) No work is done by the old man.
(b) W = mgh
(c) Saurabh is a good boy. He always helps needy and old people. He wanted to help the old man and hence asked him to put down the luggage.

Hope given Value Based Questions in Science for Class 9 Chapter 11 Work, Power and Energy are helpful to complete your science homework.

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