State carefully if the following quantities are 'positive' or 'negative': Work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket.
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We know that: $$W=\underset{F}{\rightarrow},\underset{S}{\rightarrow}=FS\cos\theta$$ 'Positive' Reason: Force is acting in the direction of displacement $$(\theta =0^{0})$$
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