Exercises III — task. Science CBSE, Class 9.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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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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