Question

2 How does the weight of the mass changes when lift is moving upward and downward

give me answer in derivation​

Answer 1

Answer:

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If you stand on a scale in an elevator accelerating upward, you feel heavier because the elevator's floor presses harder on your feet, and the scale will show a higher reading than when the elevator is at rest. On the other hand, when the elevator accelerates downward, you feel lighter.