A coolie having a box of mass 80kg on his head moving on horizontal platform.find work done by coolie in moving 10m on platform
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work done is zero because the force acting on load is in downward direction (weight due to gravity) and displacement is in horizontal direction.
So by W=F.s cos90
w=0
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Answered by
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W = F*S cos 90
W = 0
Total work done is negative because force act in downward direction and displacement is in horizontal direction .
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