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Subjects
Science CBSE
Class 9
Work and energy
Textbook questions
2.
Exercises II
Exercise condition:
2
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
.
A wind-mill is lifting water from a well.
No work is done by the windmill
Work is done by the windmill
2
.
A green plant is carrying out photosynthesis.
Work is done by a green plant
No work is done by a green plant
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