MHT CET 2025 Physics question
A child stands on a weighing machine inside a lift. When the lift is going down with acceleration , the machine shows a reading 20 N. When the lift goes upwards with acceleration , the reading would be (g = gravitational acceleration)
Answer: (A)
Solution
The reading of the machine is the normal reaction . For the lift accelerating downward with : N, so the true weight is N. For the lift accelerating upward with the same : $-mg=ma⇒
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