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Work Power and Energy question

2019 · 9 Apr · Shift 1 · Q51
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Work Power and Energy question

2019 · 9 Apr · Shift 1 · Q51

JEE MainPhysicsWork Power and EnergyMCQ+4 / −1
A uniform cable of mass 'M' and length 'L' is placed on a horizontal surface such that its (1/n)th part is hanging below the edge of the surface. To lift the hanging part of the cable upto the surface, the work done should be :
  1. A
    2MgLn2{{2MgL} \over {{n^2}}}n22MgL​
  2. B
    nMgL
  3. C
    MgL2n2{{MgL} \over {2{n^2}}}2n2MgL​
  4. D
    MgLn2{{MgL} \over {{n^2}}}n2MgL​
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