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MHT CET 2025 (21 Apr, Shift 1) · Apparent Weight & Lift

Apparent Weight & Lift question from MHT CET 2025 (21 Apr, Shift 1)

Q3MHT CET 2025 · 21 APR · SHIFT 1Medium

Apparent Weight & Lift

A child stands on a weighing machine inside a lift. When the lift is going down with acceleration $g/3$ , the machine shows a reading 20 N. When the lift goes upwards with acceleration $g/3$ , the reading would be ( $g =$ gravitational acceleration)

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Answer: (a)

Going down with $\frac{g}{3}$ : $m\left(g - \frac{g}{3}\right) = \frac{2mg}{3} = 20 \Rightarrow mg = 30$ N.
Going up with $\frac{g}{3}$ : $m\left(g + \frac{g}{3}\right) = \frac{4mg}{3} = 40$ N
So the answer is (a) 40 N.

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