A man is standing on a weighing machine in a lift which is moving. The weighing machine will slow MINIMUM reading when, the lift is moving?
Correct answer: C. In a free fall due to failure of the lift mechanism
- A. Upward with uniform speed
- B. Downward with uniform acceleration
- C. In a free fall due to failure of the lift mechanism
- D. None of these
Explanation
In free fall, the lift and the person accelerate downward together at g, so the normal force on the weighing machine becomes zero. Uniform upward motion or ordinary downward acceleration does not reduce the reading as much.
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