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

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics4.1 , newtons laws of motion1 Mark
MCQ
A person is standing in an elevator. In which situation, he experiences weight loss?
  • A
    When the elevator moves upward with constant acceleration
  • ✓
    When the elevator moves downward with constant acceleration
  • C
    When the elevator moves upward with uniform velocity
  • D
    When the elevator moves downward with uniform velocity
✓

Answer

Correct option: B.
When the elevator moves downward with constant acceleration
b
$mg - N = ma$

$\Rightarrow N = m ( g - a )$

$\therefore$ Person experiences weightloss, when acceleration of lift is downward.

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