EASY
9th CBSE
IMPORTANT
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What is the kinetic energy of an object?

Important Questions on Work and Energy

EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 11 - Work and Energy>Questions>Q 2
Write an expression for the kinetic energy of an object.
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 11 - Work and Energy>Questions>Q 3
The kinetic energy of an object of mass, m moving with a velocity of  5 ms-1 is 25 J. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 11 - Work and Energy>Questions>Q 1
What is power?
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 11 - Work and Energy>Questions>Q 2
Define 1 watt of power.
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 11 - Work and Energy>Questions>Q 3
A lamp consumes 1000 J of electrical energy in 10 s. What is its power?
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 11 - Work and Energy>Questions>Q 4
Define average power.
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 11 - Work and Energy>Exercises>Q 1
Look at the activities listed below. Reason out whether or not work is done in the light of your understanding of the term ‘work’. Suma is swimming in a pond.
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 11 - Work and Energy>Exercises>Q 1
Look at the activities listed below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A donkey is carrying a load on its back.