A porter lifts a heavy suitcase of mass 80 kg and at the destination lowers it down by a distance of 80 cm with a constant velocity. Calculate the work done by the porter in lowering the suitcase.
(take g = 9.8 ms$-$2)
Solution
$W = - N \times \Delta x$<br><br>$= - 80 \times 9.8 \times {{80} \over {100}}$<br><br>$= - 627.2$ J
About this question
Subject: Physics · Chapter: Work, Energy and Power · Topic: Work Done by a Force
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