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Work Power and Energy question

2021 · 22 Jul · Shift 2 · Q50
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  5. /2021 · 22 Jul · Shift 2 · Q50

Work Power and Energy question

2021 · 22 Jul · Shift 2 · Q50

JEE MainPhysicsWork Power and EnergyMCQ+4 / −1
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)
  1. A
    +627.2 J
  2. B
    −-− 62720.0 J
  3. C
    −-− 627.2 J
  4. D
    784.0 J
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