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4.1 , newtons laws of motion — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics4.1 , newtons laws of motion1 Mark
MCQ
A man of weight $80\, kg$ is standing in an elevator which is moving with an acceleration of $6\,\,m/{s^2}$ in upward direction. The apparent weight of the man will be  ......... $N$ $(g = 10\,m/{s^2})$
  • A
    $1480$
  • ✓
    $1280$
  • C
    $1380 $
  • D
    None of these
✓

Answer

Correct option: B.
$1280$
b
(b) The apparent weight of man,

$R = m(g + a) = 80(10 + 6) = 1280\,N$

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