A boy walks hundred metre while carrying a bag on his shoulder scientifically boy has done no work explain the statement as clearly as possible
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Explanation:
Work done by the boy is zero , because the angle between the force applied (which is equal to weight of the bag ) and displacement is 90°.
We know , w = F.s =Fs cos(theta)
w=F×s×cos90°
w=0 (cos90° = 0).
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