When does a person sitting in a lift feel that his weight is more?
A person sitting in a lift feels that his weight is more when the lift is going up at an accelerated speed. During upward acceleration, the lift floor exerts an additional force on the person, making them feel heavier due to the combined effect of gravity and acceleration.
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A person sitting in a lift feels that their weight is more when the lift is going up at an accelerated speed, which is; option [B]. This sensation occurs due to the interplay between gravitational force and the lift’s acceleration.
When the lift accelerates upward, the floor exerts an additional force on the person, adding to the gravitational force already acting on them. This combined force, known as apparent weight, is greater than the person’s actual weight. As a result, the person feels heavier than they would at rest or when the lift is moving at a constant velocity.
Conversely, when the lift is coming down at an accelerated speed (option A), the floor exerts less force on the person, reducing their apparent weight. Similarly, when the lift is moving at a constant velocity in either direction (options C and D), the person experiences their actual weight without the additional effects of acceleration.
Therefore, option [B] correctly identifies the scenario in which a person sitting in a lift feels that their weight is more: when the lift is going up at an accelerated speed.