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  4. Figure shows a man of mass 50 kg standing on a light weighing machine kept in a box of mass 30 kg. The box is hanging from a pulley fixed to the ceiling through a light rope, the other end of which is held by the man himself. If the man manages to keep the box at rest, the weight shown by the machine is <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/40c691dc083f2bbca583a142a297b9d6-.png />

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Q. Figure shows a man of mass $50 \,kg$ standing on a light weighing machine kept in a box of mass $30 \,kg$. The box is hanging from a pulley fixed to the ceiling through a light rope, the other end of which is held by the man himself. If the man manages to keep the box at rest, the weight shown by the machine is
image

Laws of Motion

Solution:

$T=N+30\,g .....(i)$
$T+N=50\,g ......(ii)$
image
$\therefore N=10\,g$
$=100\,N$