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NEET 2003
Exam
NEET
Year
2003
Subject
Physics
Chapter
Laws of Motion

NEET 2003 · Physics · Laws of Motion

A man weighs 80 ~kg . He stands on a weighing scale in a lift which...

A man weighs 80 kg80 \mathrm{~kg}. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5 m/s25 \mathrm{~m} / \mathrm{s}^2. What would be the reading on the scale? (g=10 m/s2)\left(g=10 \mathrm{~m} / \mathrm{s}^2\right)

Options

  1. Azero
  2. B400 N400 \mathrm{~N}
  3. C800 N800 \mathrm{~N}
  4. D1200 N1200 \mathrm{~N}

Correct answer

D. 1200 N1200 \mathrm{~N}

Step-by-step solution

Reading of weighing scale =m(g+a)=80(10+5)=1200 N\begin{aligned}& =m(g+a) \\ & =80(10+5)=1200 \mathrm{~N} \end{aligned}
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