PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoLift an object up. Work is done by the force exerted by you on the object. The object moves upwards. The force you exerted is in the direction of displacement. However, there is the force of gravity acting on the object.
Lifting a rock
- Which one of these forces is doing Positive work?
- Which one is doing Negative work?
Work done is negative when the force acts .
Work done is positive when the force is .
In this example,
- Work done by an external force is .
- Work done by the gravitational force is .
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