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Sally Sullivan

Give reason4. No work is done when a coolie carries a bag on his head and is standing at a place.5. Liquids can flow.​

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4. basically work is w=f.s or w=fs cos theta

when cookie carries a bag then there is angal between applied force and travelled distance is 90 degrees so when we put this value in formula it will be zero

5. bonds between molecules of liquid are week then solid so they can flow

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