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Subjects
Science CBSE
Class 9
Work and energy
Textbook questions
3.
Exercises III
Exercise condition:
3
m.
Look at the activities listed below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
1
.
An engine is pulling a train.
No work is done by the engine
Work is done by the engine
2
.
Food grains are getting dried in the sun.
No work is done
Work is done
3
.
A sailboat is moving due to wind energy.
Work is done
No work is done
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