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Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.Calculation of workEasy2 minQB

PhysicsEasysingle choice

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 $g = 9.8 {ms}^{- 2}$ )

Options:

Answer:

Solution:

$W_{Porter} + W_{mg} = ΔK . E . = 0$
$W_{Porter} = - W_{mg} = - m g h$
$= - 80 \times 9.8 \times . 8 = - 627.2 J$

Stream:JEESubject:PhysicsTopic:W.E.P.Subtopic:Calculation of work

⏱ 2mℹ️ Source: QB

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